{"api_version":"1","generated_at":"2026-08-15T08:45:46+00:00","cve":"CVE-2026-74395","urls":{"html":"https://cve.report/CVE-2026-74395","api":"https://cve.report/api/cve/CVE-2026-74395.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74395","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74395"},"summary":{"title":"RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:41","updated_at":"2026-08-15 06:22:41"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/43f8f7946814c8e5f464518246fdbc69b6e32326","name":"https://git.kernel.org/stable/c/43f8f7946814c8e5f464518246fdbc69b6e32326","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e15b770461eeaa0ff73934922cb670a6a9db04e","name":"https://git.kernel.org/stable/c/6e15b770461eeaa0ff73934922cb670a6a9db04e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1025dc2f7ba29b04b8687790fa91f9cd1a53141e","name":"https://git.kernel.org/stable/c/1025dc2f7ba29b04b8687790fa91f9cd1a53141e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9be9aca28424228586fe9211c373ebdb826ebb6c","name":"https://git.kernel.org/stable/c/9be9aca28424228586fe9211c373ebdb826ebb6c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f345e744b6b087188cde2377da5cbe9713b61353","name":"https://git.kernel.org/stable/c/f345e744b6b087188cde2377da5cbe9713b61353","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7921821fc2b19c01588311f6e7468ae5b68b1f61","name":"https://git.kernel.org/stable/c/7921821fc2b19c01588311f6e7468ae5b68b1f61","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989","name":"https://git.kernel.org/stable/c/5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/78b9589fda266c71f0f9d0c858d4fa7381a890a5","name":"https://git.kernel.org/stable/c/78b9589fda266c71f0f9d0c858d4fa7381a890a5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74395","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74395","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7597385371425febdaa8c6a1da3625d4ffff16f5 6e15b770461eeaa0ff73934922cb670a6a9db04e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7597385371425febdaa8c6a1da3625d4ffff16f5 9be9aca28424228586fe9211c373ebdb826ebb6c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7597385371425febdaa8c6a1da3625d4ffff16f5 f345e744b6b087188cde2377da5cbe9713b61353 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7597385371425febdaa8c6a1da3625d4ffff16f5 1025dc2f7ba29b04b8687790fa91f9cd1a53141e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:59:07.798Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74395","datePublished":"2026-08-15T05:59:07.798Z","dateReserved":"2026-08-15T05:44:03.891Z","dateUpdated":"2026-08-15T05:59:07.798Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:41","lastModifiedDate":"2026-08-15 06:22:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74395","Ordinal":"1","Title":"RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference","CVE":"CVE-2026-74395","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74395","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference"}]}}}