CVE-2021-47438

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47438", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:58:30.831Z", "datePublished": "2024-05-22T06:19:33.537Z", "dateUpdated": "2026-08-05T08:47:48.724Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:47:48.724Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\n\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\nwithout completing all destroy operations and that leads to memory leak.\nInstead, complete the destroy flow before return error.\n\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\nto be symmetrical with mlx5_core_create_cq().\n\nkmemleak complains on:\n\nunreferenced object 0xc000000038625100 (size 64):\n comm \"ethtool\", pid 28301, jiffies 4298062946 (age 785.380s)\n hex dump (first 32 bytes):\n 60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4.....\n 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}.....\n backtrace:\n [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core]\n [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\n [<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\n [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\n [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\n [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\n [<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\n [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230\n[mlx5_core]\n [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300\n[mlx5_core]\n [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\n [<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\n [<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0\n [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0\n [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0\n [<00000000646c5c2c>] genl_rcv_msg+0x78/0x120\n [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Reachable only via local interfaces (ethtool/netlink PRIVFLAGS_SET or RDMA uverbs/DEVX CQ destroy on mlx5), not by processing remote network packets.\nAC:L - A local actor who can drive CQ destroy (ethtool priv-flag/channel reconfiguration or IB CQ destroy) can exercise the vulnerable path; no special race or non-attacker-controlled layout is required beyond inducing the destroy error path.\nPR:L - ETHTOOL_MSG_PRIVFLAGS_SET uses GENL_UNS_ADMIN_PERM (CAP_NET_ADMIN in the local user namespace), and mlx5 IB uverbs nodes are mode 0666, so an unprivileged local user can reach CQ destroy without real init-namespace root.\nUI:N - Exploitation requires only attacker-controlled local syscalls/netlink or uverbs operations; no victim action is needed.\nS:U - Impact stays within the host kernel authority (memory leak / UAF); it does not cross VM, IOMMU, or other security boundaries.\nC:H - On the failing destroy path, debugfs CQ entries are left registered while mlx5e frees the CQ object, so subsequent debugfs reads use a dangling pointer (UAF) and can disclose freed kernel memory.\nI:N - The bug is an incomplete teardown/memory leak with a read-only debugfs UAF; there is no demonstrated attacker write or control-flow corruption primitive in this path.\nA:H - The dangling CQ debugfs UAF can oops the kernel on access, and repeated failed destroys leak kernel allocations, so availability impact is high."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/cq.c"], "versions": [{"version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "4f7bddf8c5c01cac74373443b13a68e1c6723a94", "status": "affected", "versionType": "git"}, {"version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "ed8aafea4fec9c654e63445236e0b505e27ed3a7", "status": "affected", "versionType": "git"}, {"version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "94b960b9deffc02fc0747afc01f72cc62ab099e3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/cq.c"], "versions": [{"version": "3.11", "status": "affected"}, {"version": "0", "lessThan": "3.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.75", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.14.14", "lessThanOrEqual": "5.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15", "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": "3.11", "versionEndExcluding": "5.10.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.14.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94"}, {"url": "https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7"}, {"url": "https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3"}], "title": "net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-17T18:03:33.416738Z", "id": "CVE-2021-47438", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-17T18:04:18.552Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.306Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3", "tags": ["x_transferred"]}]}]}}

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Reachable only via local interfaces (ethtool/netlink PRIVFLAGS_SET or RDMA uverbs/DEVX CQ destroy on mlx5), not by processing remote network packets.\nAC:L - A local actor who can drive CQ destroy (ethtool priv-flag/channel reconfiguration or IB CQ destroy) can exercise the vulnerable path; no special race or non-attacker-controlled layout is required beyond inducing the destroy error path.\nPR:L - ETHTOOL_MSG_PRIVFLAGS_SET uses GENL_UNS_ADMIN_PERM (CAP_NET_ADMIN in the local user namespace), and mlx5 IB uverbs nodes are mode 0666, so an unprivileged local user can reach CQ destroy without real init-namespace root.\nUI:N - Exploitation requires only attacker-controlled local syscalls/netlink or uverbs operations; no victim action is needed.\nS:U - Impact stays within the host kernel authority (memory leak / UAF); it does not cross VM, IOMMU, or other security boundaries.\nC:H - On the failing destroy path, debugfs CQ entries are left registered while mlx5e frees the CQ object, so subsequent debugfs reads use a dangling pointer (UAF) and can disclose freed kernel memory.\nI:N - The bug is an incomplete teardown/memory leak with a read-only debugfs UAF; there is no demonstrated attacker write or control-flow corruption primitive in this path.\nA:H - The dangling CQ debugfs UAF can oops the kernel on access, and repeated failed destroys leak kernel allocations, so availability impact is high."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "4f7bddf8c5c01cac74373443b13a68e1c6723a94", "versionType": "git"}, {"status": "affected", "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "ed8aafea4fec9c654e63445236e0b505e27ed3a7", "versionType": "git"}, {"status": "affected", "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "94b960b9deffc02fc0747afc01f72cc62ab099e3", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/cq.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.11"}, {"status": "unaffected", "version": "0", "lessThan": "3.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.75", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.14.14", "versionType": "semver", "lessThanOrEqual": "5.14.*"}, {"status": "unaffected", "version": "5.15", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/cq.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94"}, {"url": "https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7"}, {"url": "https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\n\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\nwithout completing all destroy operations and that leads to memory leak.\nInstead, complete the destroy flow before return error.\n\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\nto be symmetrical with mlx5_core_create_cq().\n\nkmemleak complains on:\n\nunreferenced object 0xc000000038625100 (size 64):\n comm \"ethtool\", pid 28301, jiffies 4298062946 (age 785.380s)\n hex dump (first 32 bytes):\n 60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4.....\n 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}.....\n backtrace:\n [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core]\n [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\n [<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\n [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\n [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\n [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\n [<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\n [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230\n[mlx5_core]\n [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300\n[mlx5_core]\n [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\n [<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\n [<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0\n [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0\n [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0\n [<00000000646c5c2c>] genl_rcv_msg+0x78/0x120\n [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.75", "versionStartIncluding": "3.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.14.14", "versionStartIncluding": "3.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15", "versionStartIncluding": "3.11"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:47:48.724Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47438", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:47:48.724Z", "dateReserved": "2024-05-21T14:58:30.831Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-22T06:19:33.537Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/cq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4f7bddf8c5c01cac74373443b13a68e1c6723a94", "status": "affected", "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "versionType": "git"}, {"lessThan": "ed8aafea4fec9c654e63445236e0b505e27ed3a7", "status": "affected", "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "versionType": "git"}, {"lessThan": "94b960b9deffc02fc0747afc01f72cc62ab099e3", "status": "affected", "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/cq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.11"}, {"lessThan": "3.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.75", "versionType": "semver"}, {"lessThanOrEqual": "5.14.*", "status": "unaffected", "version": "5.14.14", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.15", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CA7083CE-AF63-4A62-9833-F4FF57A65816", "versionEndExcluding": "5.10.75", "versionStartIncluding": "3.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF43A331-D430-4B9D-A612-E63C62AE4A86", "versionEndExcluding": "5.14.14", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*", "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*", "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*", "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*", "matchCriteriaId": "AF55383D-4DF2-45DC-93F7-571F4F978EAB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*", "matchCriteriaId": "9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\n\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\nwithout completing all destroy operations and that leads to memory leak.\nInstead, complete the destroy flow before return error.\n\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\nto be symmetrical with mlx5_core_create_cq().\n\nkmemleak complains on:\n\nunreferenced object 0xc000000038625100 (size 64):\n comm \"ethtool\", pid 28301, jiffies 4298062946 (age 785.380s)\n hex dump (first 32 bytes):\n 60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4.....\n 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}.....\n backtrace:\n [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core]\n [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\n [<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\n [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\n [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\n [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\n [<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\n [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230\n[mlx5_core]\n [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300\n[mlx5_core]\n [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\n [<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\n [<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0\n [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0\n [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0\n [<00000000646c5c2c>] genl_rcv_msg+0x78/0x120\n [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/mlx5e: corrige la p\u00e9rdida de memoria en la ruta de error mlx5_core_destroy_cq(). Antes de este parche, en caso de que mlx5_core_destroy_cq() fallara, regresa sin completar todas las operaciones de destrucci\u00f3n y eso conduce a una p\u00e9rdida de memoria. En su lugar, complete el flujo de destrucci\u00f3n antes de que se produzca el error de devoluci\u00f3n. Tambi\u00e9n mueva mlx5_debug_cq_remove() al principio de mlx5_core_destroy_cq() para que sea sim\u00e9trico con mlx5_core_create_cq(). kmemleak se queja de: objeto sin referencia 0xc000000038625100 (tama\u00f1o 64): comm \"ethtool\", pid 28301, jiffies 4298062946 (edad 785.380 s) volcado hexadecimal (primeros 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... rastreo hacia atr\u00e1s : [&lt;000000009e8643cb&gt;] add_res_tree+0xd0/0x270 [mlx5_core] [&lt;00000000e7cb8e6c&gt;] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [&lt;000000002a12918f&gt;] 0x1d0/0x2d0 [mlx5_core] [&lt;00000000cef0a696&gt;] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [&lt;000000009c642c26&gt;] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [&lt;0000000058dfa578&gt;] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [&lt;0000000081839561&gt;] 5e_open_channels+0x9cc/0x13e0 [mlx5_core] [&lt;0000000009cf05d4&gt;] mlx5e_switch_priv_channels+0xa4 /0x230 [mlx5_core] [&lt;0000000042bbedd8&gt;] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [&lt;0000000004bc9db8&gt;] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core [&lt;00000000a] 0553443&gt;] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [&lt;00000000a8f3d84b&gt;] etnl_set_privflags +0x234/0x2d0 [&lt;00000000fd27f27c&gt;] genl_family_rcv_msg_doit+0x108/0x1d0 [&lt;00000000f495e2bb&gt;] genl_family_rcv_msg+0xe4/0x1f0 [&lt;00000000646c5c2c&gt;] v_msg+0x78/0x120 [&lt;00000000d53e384e&gt;] netlink_rcv_skb+0x74/0x1a0"}], "id": "CVE-2021-47438", "lastModified": "2026-08-04T10:17:03.297", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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-2021-47438", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-17T18:03:33.416738Z", "version": "2.0.3"}}]}, "published": "2024-05-22T07:15:09.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path", "id": "2282875", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282875"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L", "status": "draft"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\nwithout completing all destroy operations and that leads to memory leak.\nInstead, complete the destroy flow before return error.\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\nto be symmetrical with mlx5_core_create_cq().\nkmemleak complains on:\nunreferenced object 0xc000000038625100 (size 64):\ncomm \"ethtool\", pid 28301, jiffies 4298062946 (age 785.380s)\nhex dump (first 32 bytes):\n60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4.....\n02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}.....\nbacktrace:\n[<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core]\n[<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\n[<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\n[<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\n[<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\n[<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\n[<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\n[<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230\n[mlx5_core]\n[<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300\n[mlx5_core]\n[<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\n[<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\n[<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0\n[<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0\n[<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0\n[<00000000646c5c2c>] genl_rcv_msg+0x78/0x120\n[<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0"], "name": "CVE-2021-47438", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "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": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47438\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47438\nhttps://lore.kernel.org/linux-cve-announce/2024052238-CVE-2021-47438-ceac@gregkh/T"], "threat_severity": "Low"}

{}