{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-42271", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.260Z", "datePublished": "2024-08-17T08:54:26.048Z", "dateUpdated": "2024-09-15T17:52:36.238Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-09-15T17:52:36.238Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: fix use after free in iucv_sock_close()\n\niucv_sever_path() is called from process context and from bh context.\niucv->path is used as indicator whether somebody else is taking care of\nsevering the path (or it is already removed / never existed).\nThis needs to be done with atomic compare and swap, otherwise there is a\nsmall window where iucv_sock_close() will try to work with a path that has\nalready been severed and freed by iucv_callback_connrej() called by\niucv_tasklet_fn().\n\nExample:\n[452744.123844] Call Trace:\n[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)\n[452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138\n[452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]\n[452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]\n[452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]\n[452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8\n[452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48\n[452744.124820] [<00000000d5421642>] __fput+0xba/0x268\n[452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0\n[452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90\n[452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8\n[452744.125319] Last Breaking-Event-Address:\n[452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138\n[452744.125324]\n[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt\n\nNote that bh_lock_sock() is not serializing the tasklet context against\nprocess context, because the check for sock_owned_by_user() and\ncorresponding handling is missing.\n\nIdeas for a future clean-up patch:\nA) Correct usage of bh_lock_sock() in tasklet context, as described in\nRe-enqueue, if needed. This may require adding return values to the\ntasklet functions and thus changes to all users of iucv.\n\nB) Change iucv tasklet into worker and use only lock_sock() in af_iucv."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/iucv/af_iucv.c"], "versions": [{"version": "7d316b945352", "lessThan": "84f40b46787e", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "37652fbef980", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "c65f72eec60a", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "ac758e1f663f", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "8b424c9e4411", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "01437282fd39", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "69620522c48c", "status": "affected", "versionType": "git"}, {"version": "7d316b945352", "lessThan": "f558120cd709", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/iucv/af_iucv.c"], "versions": [{"version": "3.4", "status": "affected"}, {"version": "0", "lessThan": "3.4", "status": "unaffected", "versionType": "custom"}, {"version": "4.19.320", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.4.282", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.10.224", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.15.165", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.1.104", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.6.45", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.10.4", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/84f40b46787ecb67c7ad08a5bb1376141fa10c01"}, {"url": "https://git.kernel.org/stable/c/37652fbef9809411cea55ea5fa1a170e299efcd0"}, {"url": "https://git.kernel.org/stable/c/c65f72eec60a34ace031426e04e9aff8e5f04895"}, {"url": "https://git.kernel.org/stable/c/ac758e1f663fe9bc64f6b47212a2aa18697524f5"}, {"url": "https://git.kernel.org/stable/c/8b424c9e44111c5a76f41c6b741f8d4c4179d876"}, {"url": "https://git.kernel.org/stable/c/01437282fd3904810603f3dc98d2cac6b8b6fc84"}, {"url": "https://git.kernel.org/stable/c/69620522c48ce8215e5eb55ffbab8cafee8f407d"}, {"url": "https://git.kernel.org/stable/c/f558120cd709682b739207b48cf7479fd9568431"}], "title": "net/iucv: fix use after free in iucv_sock_close()", "x_generator": {"engine": "bippy-c9c4e1df01b2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42271", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:12:11.442193Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:32.331Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42271", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:12:11.442193Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:23.896Z"}}], "cna": {"title": "net/iucv: fix use after free in iucv_sock_close()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "7d316b945352", "lessThan": "84f40b46787e", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "37652fbef980", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "c65f72eec60a", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "ac758e1f663f", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "8b424c9e4411", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "01437282fd39", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "69620522c48c", "versionType": "git"}, {"status": "affected", "version": "7d316b945352", "lessThan": "f558120cd709", "versionType": "git"}], "programFiles": ["net/iucv/af_iucv.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.4"}, {"status": "unaffected", "version": "0", "lessThan": "3.4", "versionType": "custom"}, {"status": "unaffected", "version": "4.19.320", "versionType": "custom", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.282", "versionType": "custom", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.224", "versionType": "custom", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.165", "versionType": "custom", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.104", "versionType": "custom", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.45", "versionType": "custom", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.10.4", "versionType": "custom", "lessThanOrEqual": "6.10.*"}, {"status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/iucv/af_iucv.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/84f40b46787ecb67c7ad08a5bb1376141fa10c01"}, {"url": "https://git.kernel.org/stable/c/37652fbef9809411cea55ea5fa1a170e299efcd0"}, {"url": "https://git.kernel.org/stable/c/c65f72eec60a34ace031426e04e9aff8e5f04895"}, {"url": "https://git.kernel.org/stable/c/ac758e1f663fe9bc64f6b47212a2aa18697524f5"}, {"url": "https://git.kernel.org/stable/c/8b424c9e44111c5a76f41c6b741f8d4c4179d876"}, {"url": "https://git.kernel.org/stable/c/01437282fd3904810603f3dc98d2cac6b8b6fc84"}, {"url": "https://git.kernel.org/stable/c/69620522c48ce8215e5eb55ffbab8cafee8f407d"}, {"url": "https://git.kernel.org/stable/c/f558120cd709682b739207b48cf7479fd9568431"}], "x_generator": {"engine": "bippy-c9c4e1df01b2"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: fix use after free in iucv_sock_close()\n\niucv_sever_path() is called from process context and from bh context.\niucv->path is used as indicator whether somebody else is taking care of\nsevering the path (or it is already removed / never existed).\nThis needs to be done with atomic compare and swap, otherwise there is a\nsmall window where iucv_sock_close() will try to work with a path that has\nalready been severed and freed by iucv_callback_connrej() called by\niucv_tasklet_fn().\n\nExample:\n[452744.123844] Call Trace:\n[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)\n[452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138\n[452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]\n[452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]\n[452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]\n[452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8\n[452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48\n[452744.124820] [<00000000d5421642>] __fput+0xba/0x268\n[452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0\n[452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90\n[452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8\n[452744.125319] Last Breaking-Event-Address:\n[452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138\n[452744.125324]\n[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt\n\nNote that bh_lock_sock() is not serializing the tasklet context against\nprocess context, because the check for sock_owned_by_user() and\ncorresponding handling is missing.\n\nIdeas for a future clean-up patch:\nA) Correct usage of bh_lock_sock() in tasklet context, as described in\nRe-enqueue, if needed. This may require adding return values to the\ntasklet functions and thus changes to all users of iucv.\n\nB) Change iucv tasklet into worker and use only lock_sock() in af_iucv."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-09-15T17:52:36.238Z"}}}, "cveMetadata": {"cveId": "CVE-2024-42271", "state": "PUBLISHED", "dateUpdated": "2024-09-15T17:52:36.238Z", "dateReserved": "2024-07-30T07:40:12.260Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-08-17T08:54:26.048Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D4F8C11A-E708-4EBE-97BC-D7F6041074D6", "versionEndExcluding": "4.19.320", "versionStartIncluding": "3.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A8961D98-9ACF-4188-BA88-44038B14BC28", "versionEndExcluding": "5.4.282", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5CCEDF13-293D-4E64-B501-4409D0365AFE", "versionEndExcluding": "5.10.224", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B4E2B568-3171-41DE-B519-F2B1A3600D94", "versionEndExcluding": "5.15.165", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20DB9042-F89E-4024-B005-ACBBA99CA659", "versionEndExcluding": "6.1.104", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6ED8FBDF-48EE-4FEB-8B1A-CFF4FBCB27BF", "versionEndExcluding": "6.6.45", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1F9FECDC-6CB8-41E5-B32A-E46776100D9C", "versionEndExcluding": "6.10.4", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*", "matchCriteriaId": "8B3CE743-2126-47A3-8B7C-822B502CF119", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: fix use after free in iucv_sock_close()\n\niucv_sever_path() is called from process context and from bh context.\niucv->path is used as indicator whether somebody else is taking care of\nsevering the path (or it is already removed / never existed).\nThis needs to be done with atomic compare and swap, otherwise there is a\nsmall window where iucv_sock_close() will try to work with a path that has\nalready been severed and freed by iucv_callback_connrej() called by\niucv_tasklet_fn().\n\nExample:\n[452744.123844] Call Trace:\n[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)\n[452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138\n[452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]\n[452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]\n[452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]\n[452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8\n[452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48\n[452744.124820] [<00000000d5421642>] __fput+0xba/0x268\n[452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0\n[452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90\n[452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8\n[452744.125319] Last Breaking-Event-Address:\n[452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138\n[452744.125324]\n[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt\n\nNote that bh_lock_sock() is not serializing the tasklet context against\nprocess context, because the check for sock_owned_by_user() and\ncorresponding handling is missing.\n\nIdeas for a future clean-up patch:\nA) Correct usage of bh_lock_sock() in tasklet context, as described in\nRe-enqueue, if needed. This may require adding return values to the\ntasklet functions and thus changes to all users of iucv.\n\nB) Change iucv tasklet into worker and use only lock_sock() in af_iucv."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/iucv: corrige el use after free en iucv_sock_close() iucv_sever_path() se llama desde el contexto del proceso y desde el contexto bh. iucv-&gt;path se utiliza como indicador de si alguien m\u00e1s se est\u00e1 encargando de cortar la ruta (o si ya se elimin\u00f3 o nunca existi\u00f3). Esto debe hacerse con comparaci\u00f3n e intercambio at\u00f3mico; de lo contrario, hay una peque\u00f1a ventana donde iucv_sock_close() intentar\u00e1 trabajar con una ruta que ya ha sido cortada y liberada por iucv_callback_connrej() llamada por iucv_tasklet_fn(). Ejemplo: [452744.123844] Seguimiento de llamadas: [452744.123845] ([&lt;0000001e87f03880&gt;] 0x1e87f03880) [452744.123966] [&lt;00000000d593001e&gt;] iucv_path_sever+0x96/0x13 8 [452744.124330] [&lt;000003ff801ddbca&gt;] iucv_sever_path+0xc2/0xd0 [af_iucv] [452744.124336 ] [&lt;000003ff801e01b6&gt;] iucv_sock_close+0xa6/0x310 [af_iucv] [452744.124341] [&lt;000003ff801e08cc&gt;] iucv_sock_release+0x3c/0xd0 [af_iucv] [452744.124345] 000000d574794e&gt;] __sock_release+0x5e/0xe8 [452744.124815] [&lt;00000000d5747a0c&gt; ] sock_close+0x34/0x48 [452744.124820] [&lt;00000000d5421642&gt;] __fput+0xba/0x268 [452744.124826] [&lt;00000000d51b382c&gt;] task_work_run+0xbc/0xf0 [452744.1 24832] [&lt;00000000d5145710&gt;] do_notify_resume+0x88/0x90 [452744.124841] [&lt; 00000000d5978096&gt;] system_call+0xe2/0x2c8 [452744.125319] \u00daltima direcci\u00f3n del evento de \u00faltima hora: [452744.125321] [&lt;00000000d5930018&gt;] iucv_path_sever+0x90/0x138 [452744.125 324] [452744.125325] P\u00e1nico del kernel: no se sincroniza: excepci\u00f3n fatal en la interrupci\u00f3n. Tenga en cuenta que bh_lock_sock () no serializa el contexto del tasklet con respecto al contexto del proceso, porque falta la verificaci\u00f3n de sock_owned_by_user() y el manejo correspondiente. Ideas para un futuro parche de limpieza: A) Uso correcto de bh_lock_sock() en el contexto del tasklet, como se describe en Volver a poner en cola, si es necesario. Esto puede requerir agregar valores de retorno a las funciones del tasklet y, por lo tanto, cambios para todos los usuarios de iucv. B) Cambie el tasklet iucv a trabajador y use solo lock_sock() en af_iucv."}], "id": "CVE-2024-42271", "lastModified": "2024-08-19T20:03:31.840", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-08-17T09:15:08.307", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/01437282fd3904810603f3dc98d2cac6b8b6fc84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37652fbef9809411cea55ea5fa1a170e299efcd0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69620522c48ce8215e5eb55ffbab8cafee8f407d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/84f40b46787ecb67c7ad08a5bb1376141fa10c01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8b424c9e44111c5a76f41c6b741f8d4c4179d876"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ac758e1f663fe9bc64f6b47212a2aa18697524f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c65f72eec60a34ace031426e04e9aff8e5f04895"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f558120cd709682b739207b48cf7479fd9568431"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net/iucv: fix use after free in iucv_sock_close()", "id": "2305416", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2305416"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/iucv: fix use after free in iucv_sock_close()\niucv_sever_path() is called from process context and from bh context.\niucv->path is used as indicator whether somebody else is taking care of\nsevering the path (or it is already removed / never existed).\nThis needs to be done with atomic compare and swap, otherwise there is a\nsmall window where iucv_sock_close() will try to work with a path that has\nalready been severed and freed by iucv_callback_connrej() called by\niucv_tasklet_fn().\nExample:\n[452744.123844] Call Trace:\n[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)\n[452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138\n[452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]\n[452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]\n[452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]\n[452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8\n[452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48\n[452744.124820] [<00000000d5421642>] __fput+0xba/0x268\n[452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0\n[452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90\n[452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8\n[452744.125319] Last Breaking-Event-Address:\n[452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138\n[452744.125324]\n[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt\nNote that bh_lock_sock() is not serializing the tasklet context against\nprocess context, because the check for sock_owned_by_user() and\ncorresponding handling is missing.\nIdeas for a future clean-up patch:\nA) Correct usage of bh_lock_sock() in tasklet context, as described in\nRe-enqueue, if needed. This may require adding return values to the\ntasklet functions and thus changes to all users of iucv.\nB) Change iucv tasklet into worker and use only lock_sock() in af_iucv."], "name": "CVE-2024-42271", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42271\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42271\nhttps://lore.kernel.org/linux-cve-announce/2024081739-CVE-2024-42271-c501@gregkh/T"], "threat_severity": "Moderate"}