{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74395", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.891Z", "datePublished": "2026-08-15T05:59:07.798Z", "dateUpdated": "2026-08-17T05:18:34.634Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:18:34.634Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix devx subscribe-event unwind NULL dereference\n\nMLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list\nbefore initializing the fields used by the shared error path.\n\nIf eventfd_ctx_fdget() then fails, the unwind path dereferences\nevent_sub->ev_file in uverbs_uobject_put() and calls\nsubscribe_event_xa_dealloc() with an unset xa_key_level1.\n\nsubscribe_event_xa_alloc() creates the XA entry exactly once for a given\nkey_level1, on the first occurrence of that key. The unwind path must\ntherefore call subscribe_event_xa_dealloc() exactly once for it as well.\n\nEnforce that by adding devx_key_in_sub_list() and calling\nsubscribe_event_xa_dealloc() only when the last matching pending entry is\nbeing cleaned up."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/mlx5/devx.c"], "versions": [{"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "6e15b770461eeaa0ff73934922cb670a6a9db04e", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "9be9aca28424228586fe9211c373ebdb826ebb6c", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "f345e744b6b087188cde2377da5cbe9713b61353", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "1025dc2f7ba29b04b8687790fa91f9cd1a53141e", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "7921821fc2b19c01588311f6e7468ae5b68b1f61", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "78b9589fda266c71f0f9d0c858d4fa7381a890a5", "status": "affected", "versionType": "git"}, {"version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "lessThan": "43f8f7946814c8e5f464518246fdbc69b6e32326", "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/infiniband/hw/mlx5/devx.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.3", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6e15b770461eeaa0ff73934922cb670a6a9db04e"}, {"url": "https://git.kernel.org/stable/c/9be9aca28424228586fe9211c373ebdb826ebb6c"}, {"url": "https://git.kernel.org/stable/c/f345e744b6b087188cde2377da5cbe9713b61353"}, {"url": "https://git.kernel.org/stable/c/1025dc2f7ba29b04b8687790fa91f9cd1a53141e"}, {"url": "https://git.kernel.org/stable/c/7921821fc2b19c01588311f6e7468ae5b68b1f61"}, {"url": "https://git.kernel.org/stable/c/5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989"}, {"url": "https://git.kernel.org/stable/c/78b9589fda266c71f0f9d0c858d4fa7381a890a5"}, {"url": "https://git.kernel.org/stable/c/43f8f7946814c8e5f464518246fdbc69b6e32326"}], "title": "RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/mlx5/devx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6e15b770461eeaa0ff73934922cb670a6a9db04e", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "9be9aca28424228586fe9211c373ebdb826ebb6c", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "f345e744b6b087188cde2377da5cbe9713b61353", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "1025dc2f7ba29b04b8687790fa91f9cd1a53141e", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "7921821fc2b19c01588311f6e7468ae5b68b1f61", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "78b9589fda266c71f0f9d0c858d4fa7381a890a5", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}, {"lessThan": "43f8f7946814c8e5f464518246fdbc69b6e32326", "status": "affected", "version": "7597385371425febdaa8c6a1da3625d4ffff16f5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/mlx5/devx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"lessThan": "5.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix devx subscribe-event unwind NULL dereference\n\nMLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list\nbefore initializing the fields used by the shared error path.\n\nIf eventfd_ctx_fdget() then fails, the unwind path dereferences\nevent_sub->ev_file in uverbs_uobject_put() and calls\nsubscribe_event_xa_dealloc() with an unset xa_key_level1.\n\nsubscribe_event_xa_alloc() creates the XA entry exactly once for a given\nkey_level1, on the first occurrence of that key. The unwind path must\ntherefore call subscribe_event_xa_dealloc() exactly once for it as well.\n\nEnforce that by adding devx_key_in_sub_list() and calling\nsubscribe_event_xa_dealloc() only when the last matching pending entry is\nbeing cleaned up."}], "id": "CVE-2026-74395", "lastModified": "2026-08-17T06:19:34.557", "metrics": {}, "published": "2026-08-15T06:22:41.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1025dc2f7ba29b04b8687790fa91f9cd1a53141e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/43f8f7946814c8e5f464518246fdbc69b6e32326"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e15b770461eeaa0ff73934922cb670a6a9db04e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78b9589fda266c71f0f9d0c858d4fa7381a890a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7921821fc2b19c01588311f6e7468ae5b68b1f61"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9be9aca28424228586fe9211c373ebdb826ebb6c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f345e744b6b087188cde2377da5cbe9713b61353"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference", "id": "2516918", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516918"}, "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": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/mlx5: Fix devx subscribe-event unwind NULL dereference\nMLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list\nbefore initializing the fields used by the shared error path.\nIf eventfd_ctx_fdget() then fails, the unwind path dereferences\nevent_sub->ev_file in uverbs_uobject_put() and calls\nsubscribe_event_xa_dealloc() with an unset xa_key_level1.\nsubscribe_event_xa_alloc() creates the XA entry exactly once for a given\nkey_level1, on the first occurrence of that key. The unwind path must\ntherefore call subscribe_event_xa_dealloc() exactly once for it as well.\nEnforce that by adding devx_key_in_sub_list() and calling\nsubscribe_event_xa_dealloc() only when the last matching pending entry is\nbeing cleaned up.", "A flaw was found in the RDMA/mlx5 component of the Linux kernel. During the `devx subscribe-event` unwind process, a null pointer dereference can occur if `eventfd_ctx_fdget()` fails. This issue arises because `event_sub` is linked into `sub_list` before its fields are properly initialized, leading to an attempt to dereference a null pointer. A local attacker could potentially exploit this to cause a denial of service (DoS) by crashing the system."], "name": "CVE-2026-74395", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74395\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74395\nhttps://lore.kernel.org/linux-cve-announce/2026081508-CVE-2026-74395-4139@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,6e15b770461eeaa0ff73934922cb670a6a9db04e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,9be9aca28424228586fe9211c373ebdb826ebb6c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,f345e744b6b087188cde2377da5cbe9713b61353)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,1025dc2f7ba29b04b8687790fa91f9cd1a53141e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,7921821fc2b19c01588311f6e7468ae5b68b1f61)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,78b9589fda266c71f0f9d0c858d4fa7381a890a5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7597385371425febdaa8c6a1da3625d4ffff16f5,43f8f7946814c8e5f464518246fdbc69b6e32326)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T17:30:11.723874+00:00", "updated": "2026-08-22T00:00:16.110543+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}