{"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"}}}}