{"id":"CVE-2026-98217","state":"PUBLISHED","title":"IB/mlx4: Fix use-after-free on pkey sysfs registration failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx4: Fix use-after-free on pkey sysfs registration failure\n\nregister_pkey_tree() ignores errors from register_one_pkey_tree() and\ncontinues registering the remaining slaves. The per-slave error path has\nalready released the pkey parent kobjects, but their pointers remain\nstored in the device. A later device cleanup therefore passes the stale\npointers to kobject_put(), causing a use-after-free.\n\nClear the parent pointers after releasing a failed slave tree and skip\nunregistered trees during device cleanup. This preserves the existing\nbest-effort registration behavior while preventing a second cleanup of\nthe failed tree.","publishedAt":"2026-10-06T08:44:53.152Z","updatedAt":"2026-10-19T09:15:47.995Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"791471421d848ce13e84f4b21c9e19973d471c4e","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"734f066933484f6c7cedea0312763249beed5845","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"a07bee32127d7c4cd3b1bb9a088e21d0c93634c9","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"cf20d7476754c00eec04ae23d3e929de33ce0345","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"0c3482e965b18bc242e54e899d1c4d391ca8e5e3","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"ffb80872617b5f9b3dd1536ec2909029fa66f228","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"ced1186fea7c77e16681c7ef4802897885989c3b","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"1af874e9f4ce22ccf8b10ab5462f32c70d3be21a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/mlx4/sysfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/mlx4/sysfs.c"]}],"references":["https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e","https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845","https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9","https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345","https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3","https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228","https://git.kernel.org/stable/c/ced1186fea7c77e16681c7ef4802897885989c3b","https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98217.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98217","state":"PUBLISHED","datePublished":"2026-10-06T08:44:53.152Z","dateUpdated":"2026-10-19T09:15:47.995Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.326Z"},"containers":{"cna":{"title":"IB/mlx4: Fix use-after-free on pkey sysfs registration failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx4: Fix use-after-free on pkey sysfs registration failure\n\nregister_pkey_tree() ignores errors from register_one_pkey_tree() and\ncontinues registering the remaining slaves. The per-slave error path has\nalready released the pkey parent kobjects, but their pointers remain\nstored in the device. A later device cleanup therefore passes the stale\npointers to kobject_put(), causing a use-after-free.\n\nClear the parent pointers after releasing a failed slave tree and skip\nunregistered trees during device cleanup. This preserves the existing\nbest-effort registration behavior while preventing a second cleanup of\nthe failed tree."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"791471421d848ce13e84f4b21c9e19973d471c4e","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"734f066933484f6c7cedea0312763249beed5845","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"a07bee32127d7c4cd3b1bb9a088e21d0c93634c9","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"cf20d7476754c00eec04ae23d3e929de33ce0345","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"0c3482e965b18bc242e54e899d1c4d391ca8e5e3","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"ffb80872617b5f9b3dd1536ec2909029fa66f228","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"ced1186fea7c77e16681c7ef4802897885989c3b","versionType":"git"},{"version":"c1e7e466120b80ce49e91af0c9da1ce6dee4844a","status":"affected","lessThan":"1af874e9f4ce22ccf8b10ab5462f32c70d3be21a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/mlx4/sysfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/mlx4/sysfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e"},{"url":"https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845"},{"url":"https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9"},{"url":"https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345"},{"url":"https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3"},{"url":"https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228"},{"url":"https://git.kernel.org/stable/c/ced1186fea7c77e16681c7ef4802897885989c3b"},{"url":"https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:15:47.995Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}