CVE-2023-52813

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In normal\ncase, aead_request_complete() will be called in pcrypt_aead_serial and the\nreturn err is 0 for padata_do_parallel. But, when pinst->flags is\nPADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it\nwon't call aead_request_complete(). Therefore, test_aead_vec_cfg will\nhung at wait_for_completion(&wait->completion), which will cause\nhungtask.\n\nThe problem comes as following:\n(padata_do_parallel) |\n rcu_read_lock_bh(); |\n err = -EINVAL; | (padata_replace)\n | pinst->flags |= PADATA_RESET;\n err = -EBUSY |\n if (pinst->flags & PADATA_RESET) |\n rcu_read_unlock_bh() |\n return err\n\nIn order to resolve the problem, we replace the return err -EBUSY with\n-EAGAIN, which means parallel_data is changing, and the caller should call\nit again.\n\nv3:\nremove retry and just change the return err.\nv2:\nintroduce padata_try_do_parallel() in pcrypt_aead_encrypt and\npcrypt_aead_decrypt to solve the hungtask."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/pcrypt.c", "kernel/padata.c"], "versions": [{"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "fb2d3a50a8f29a3c66682bb426144f40e32ab818", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "039fec48e062504f14845124a1a25eb199b2ddc0", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "c9c1334697301c10e6918d747ed38abfbc0c96e7", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "e97bf4ada7dddacd184c3e196bd063b0dc71b41d", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "546c1796ad1ed0d87dab3c4b5156d75819be2316", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "c55fc098fd9d2dca475b82d00ffbcaf97879d77e", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "e134f3aba98e6c801a693f540912c2d493718ddf", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "372636debe852913529b1716f44addd94fff2d28", "status": "affected", "versionType": "git"}, {"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "8f4f68e788c3a7a696546291258bfa5fdb215523", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/pcrypt.c", "kernel/padata.c"], "versions": [{"version": "2.6.34", "status": "affected"}, {"version": "0", "lessThan": "2.6.34", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.331", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.300", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.262", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.202", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.140", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.64", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5.13", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.3", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "4.14.331"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": 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Fix hungtask for PADATA_RESET", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "fb2d3a50a8f29a3c66682bb426144f40e32ab818", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "039fec48e062504f14845124a1a25eb199b2ddc0", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "c9c1334697301c10e6918d747ed38abfbc0c96e7", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "e97bf4ada7dddacd184c3e196bd063b0dc71b41d", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "546c1796ad1ed0d87dab3c4b5156d75819be2316", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "c55fc098fd9d2dca475b82d00ffbcaf97879d77e", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "e134f3aba98e6c801a693f540912c2d493718ddf", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "372636debe852913529b1716f44addd94fff2d28", "versionType": "git"}, {"status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "lessThan": "8f4f68e788c3a7a696546291258bfa5fdb215523", "versionType": "git"}], "programFiles": ["crypto/pcrypt.c", "kernel/padata.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.34"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.34", "versionType": "semver"}, {"status": "unaffected", "version": "4.14.331", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.300", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.262", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.202", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.140", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.64", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.5.13", "versionType": "semver", "lessThanOrEqual": "6.5.*"}, {"status": "unaffected", "version": "6.6.3", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["crypto/pcrypt.c", "kernel/padata.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818"}, {"url": "https://git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0"}, {"url": "https://git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7"}, {"url": "https://git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d"}, {"url": "https://git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316"}, {"url": "https://git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e"}, {"url": "https://git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf"}, {"url": "https://git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28"}, {"url": "https://git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: pcrypt - Fix hungtask for PADATA_RESET\n\nWe found a hungtask bug in test_aead_vec_cfg as follows:\n\nINFO: task cryptomgr_test:391009 blocked for more than 120 seconds.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\nCall trace:\n __switch_to+0x98/0xe0\n __schedule+0x6c4/0xf40\n schedule+0xd8/0x1b4\n schedule_timeout+0x474/0x560\n wait_for_common+0x368/0x4e0\n wait_for_completion+0x20/0x30\n wait_for_completion+0x20/0x30\n test_aead_vec_cfg+0xab4/0xd50\n test_aead+0x144/0x1f0\n alg_test_aead+0xd8/0x1e0\n alg_test+0x634/0x890\n cryptomgr_test+0x40/0x70\n kthread+0x1e0/0x220\n ret_from_fork+0x10/0x18\n Kernel panic - not syncing: hung_task: blocked tasks\n\nFor padata_do_parallel, when the return err is 0 or -EBUSY, it will call\nwait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal\ncase, aead_request_complete() will be called in pcrypt_aead_serial and the\nreturn err is 0 for padata_do_parallel. But, when pinst->flags is\nPADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it\nwon't call aead_request_complete(). Therefore, test_aead_vec_cfg will\nhung at wait_for_completion(&wait->completion), which will cause\nhungtask.\n\nThe problem comes as following:\n(padata_do_parallel) |\n rcu_read_lock_bh(); |\n err = -EINVAL; | (padata_replace)\n | pinst->flags |= PADATA_RESET;\n err = -EBUSY |\n if (pinst->flags & PADATA_RESET) |\n rcu_read_unlock_bh() |\n return err\n\nIn order to resolve the problem, we replace the return err -EBUSY with\n-EAGAIN, which means parallel_data is changing, and the caller should call\nit again.\n\nv3:\nremove retry and just change the return err.\nv2:\nintroduce padata_try_do_parallel() in pcrypt_aead_encrypt and\npcrypt_aead_decrypt to solve the hungtask."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.331", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.300", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.262", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.202", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.140", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.64", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.5.13", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.3", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7", "versionStartIncluding": "2.6.34"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-07-15T15:43:50.801Z"}}}, "cveMetadata": {"cveId": "CVE-2023-52813", "state": "PUBLISHED", "dateUpdated": "2025-07-15T15:43:50.801Z", "dateReserved": "2024-05-21T15:19:24.248Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T15:31:21.604Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["crypto/pcrypt.c", "kernel/padata.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "fb2d3a50a8f29a3c66682bb426144f40e32ab818", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "039fec48e062504f14845124a1a25eb199b2ddc0", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "c9c1334697301c10e6918d747ed38abfbc0c96e7", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "e97bf4ada7dddacd184c3e196bd063b0dc71b41d", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "546c1796ad1ed0d87dab3c4b5156d75819be2316", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "c55fc098fd9d2dca475b82d00ffbcaf97879d77e", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "e134f3aba98e6c801a693f540912c2d493718ddf", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "372636debe852913529b1716f44addd94fff2d28", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}, {"lessThan": "8f4f68e788c3a7a696546291258bfa5fdb215523", "status": "affected", "version": "16295bec6398a3eedc9377e1af6ff4c71b98c300", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["crypto/pcrypt.c", "kernel/padata.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.34"}, {"lessThan": "2.6.34", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.14.*", "status": "unaffected", "version": "4.14.331", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.300", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.262", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.202", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.140", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.64", "versionType": "semver"}, {"lessThanOrEqual": "6.5.*", "status": "unaffected", "version": "6.5.13", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.7", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0A33B97C-82BF-41CC-9556-0FDC756CA426", "versionEndExcluding": "4.14.331", "versionStartIncluding": "2.6.34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C99DDB75-1CAC-40D0-A14D-67A2A55D6005", "versionEndExcluding": "4.19.300", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "28B0AAED-45BA-4928-9A85-66A429B9F038", "versionEndExcluding": "5.4.262", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "39D508B4-58C7-40C2-BE05-44E41110EB98", "versionEndExcluding": "5.10.202", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "15D6C23C-78A3-40D2-B76B-4F1D9C2D95C0", "versionEndExcluding": "5.15.140", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8D7C884A-CAA2-4EA2-9FEB-5CE776D7B05F", "versionEndExcluding": "6.1.64", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "674C4F82-C336-4B49-BF64-1DE422E889C4", "versionEndExcluding": "6.5.13", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B58252FA-A49C-411F-9B28-DC5FE44BC5A0", "versionEndExcluding": "6.6.3", "versionStartIncluding": "6.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: pcrypt - Fix hungtask for PADATA_RESET\n\nWe found a hungtask bug in test_aead_vec_cfg as follows:\n\nINFO: task cryptomgr_test:391009 blocked for more than 120 seconds.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\nCall trace:\n __switch_to+0x98/0xe0\n __schedule+0x6c4/0xf40\n schedule+0xd8/0x1b4\n schedule_timeout+0x474/0x560\n wait_for_common+0x368/0x4e0\n wait_for_completion+0x20/0x30\n wait_for_completion+0x20/0x30\n test_aead_vec_cfg+0xab4/0xd50\n test_aead+0x144/0x1f0\n alg_test_aead+0xd8/0x1e0\n alg_test+0x634/0x890\n cryptomgr_test+0x40/0x70\n kthread+0x1e0/0x220\n ret_from_fork+0x10/0x18\n Kernel panic - not syncing: hung_task: blocked tasks\n\nFor padata_do_parallel, when the return err is 0 or -EBUSY, it will call\nwait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal\ncase, aead_request_complete() will be called in pcrypt_aead_serial and the\nreturn err is 0 for padata_do_parallel. But, when pinst->flags is\nPADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it\nwon't call aead_request_complete(). Therefore, test_aead_vec_cfg will\nhung at wait_for_completion(&wait->completion), which will cause\nhungtask.\n\nThe problem comes as following:\n(padata_do_parallel) |\n rcu_read_lock_bh(); |\n err = -EINVAL; | (padata_replace)\n | pinst->flags |= PADATA_RESET;\n err = -EBUSY |\n if (pinst->flags & PADATA_RESET) |\n rcu_read_unlock_bh() |\n return err\n\nIn order to resolve the problem, we replace the return err -EBUSY with\n-EAGAIN, which means parallel_data is changing, and the caller should call\nit again.\n\nv3:\nremove retry and just change the return err.\nv2:\nintroduce padata_try_do_parallel() in pcrypt_aead_encrypt and\npcrypt_aead_decrypt to solve the hungtask."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: crypto: pcrypt - Reparar hungtask para PADATA_RESET. Encontramos un error de hungtask en test_aead_vec_cfg de la siguiente manera: INFORMACI\u00d3N: tarea cryptomgr_test:391009 bloqueada durante m\u00e1s de 120 segundos. \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" desactiva este mensaje. Seguimiento de llamadas: __switch_to+0x98/0xe0 __schedule+0x6c4/0xf40 Schedule+0xd8/0x1b4 Schedule_timeout+0x474/0x560 wait_for_common+0x368/0x4e0 wait_for_completion+0x20/0x30 wait_for_completion+0x20/0x30 test_aead_ve c_cfg+0xab4/0xd50 test_aead+0x144/0x1f0 alg_test_aead+ 0xd8/0x1e0 alg_test+0x634/0x890 cryptomgr_test+0x40/0x70 kthread+0x1e0/0x220 ret_from_fork+0x10/0x18 kernel panic - no syncing: hung_task: tareas bloqueadas para el error for_completion (&esperar->finalizaci\u00f3n) en test_aead_vec_cfg. En caso normal, se llamar\u00e1 aead_request_complete() en pcrypt_aead_serial y el error de retorno es 0 para padata_do_parallel. Pero, cuando pinst->flags es PADATA_RESET, el error de retorno es -EBUSY para padata_do_parallel y no llamar\u00e1 a aead_request_complete(). Por lo tanto, test_aead_vec_cfg se colgar\u00e1 en wait_for_completion(&wait->completion), lo que provocar\u00e1 que se cuelgue la tarea. El problema viene de la siguiente manera: (padata_do_parallel) | rcu_read_lock_bh(); | err = -EINVAL; | (padata_replace) | pinst->flags |= PADATA_RESET; err = -EBUSY | si (pinst->flags & PADATA_RESET) | rcu_read_unlock_bh() | return err Para resolver el problema, reemplazamos el retorno err -EBUSY con -EAGAIN, lo que significa que los datos_paralelos est\u00e1n cambiando y la persona que llama debe llamarlo nuevamente. v3: elimine el reintento y simplemente cambie el error de devoluci\u00f3n. v2: introduce padata_try_do_parallel() en pcrypt_aead_encrypt y pcrypt_aead_decrypt para resolver la tarea colgada."}], "id": "CVE-2023-52813", "lastModified": "2026-06-17T06:43:38.660", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52813", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-23T17:18:51.048604Z", "version": "2.0.3"}}]}, "published": "2024-05-21T16:15:19.477", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:4352", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.8.1.rt7.349.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-07-08T00:00:00Z"}, {"advisory": "RHSA-2024:4211", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.8.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-07-02T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2025:7526", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.68.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-05-14T00:00:00Z"}], "bugzilla": {"description": "kernel: crypto: pcrypt - Fix hungtask for PADATA_RESET", "id": "2282653", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282653"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncrypto: pcrypt - Fix hungtask for PADATA_RESET\nWe found a hungtask bug in test_aead_vec_cfg as follows:\nINFO: task cryptomgr_test:391009 blocked for more than 120 seconds.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\nCall trace:\n__switch_to+0x98/0xe0\n__schedule+0x6c4/0xf40\nschedule+0xd8/0x1b4\nschedule_timeout+0x474/0x560\nwait_for_common+0x368/0x4e0\nwait_for_completion+0x20/0x30\nwait_for_completion+0x20/0x30\ntest_aead_vec_cfg+0xab4/0xd50\ntest_aead+0x144/0x1f0\nalg_test_aead+0xd8/0x1e0\nalg_test+0x634/0x890\ncryptomgr_test+0x40/0x70\nkthread+0x1e0/0x220\nret_from_fork+0x10/0x18\nKernel panic - not syncing: hung_task: blocked tasks\nFor padata_do_parallel, when the return err is 0 or -EBUSY, it will call\nwait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal\ncase, aead_request_complete() will be called in pcrypt_aead_serial and the\nreturn err is 0 for padata_do_parallel. But, when pinst->flags is\nPADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it\nwon't call aead_request_complete(). Therefore, test_aead_vec_cfg will\nhung at wait_for_completion(&wait->completion), which will cause\nhungtask.\nThe problem comes as following:\n(padata_do_parallel) |\nrcu_read_lock_bh(); |\nerr = -EINVAL; | (padata_replace)\n| pinst->flags |= PADATA_RESET;\nerr = -EBUSY |\nif (pinst->flags & PADATA_RESET) |\nrcu_read_unlock_bh() |\nreturn err\nIn order to resolve the problem, we replace the return err -EBUSY with\n-EAGAIN, which means parallel_data is changing, and the caller should call\nit again.\nv3:\nremove retry and just change the return err.\nv2:\nintroduce padata_try_do_parallel() in pcrypt_aead_encrypt and\npcrypt_aead_decrypt to solve the hungtask."], "name": "CVE-2023-52813", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52813\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52813\nhttps://lore.kernel.org/linux-cve-announce/2024052103-CVE-2023-52813-0704@gregkh/T"], "threat_severity": "Low"}

{}