{"id":"CVE-2026-72449","state":"PUBLISHED","title":"drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix list_del corruption in kfd_criu_resume_svm\n\nThe cleanup tail of kfd_criu_resume_svm() walks\nsvms->criu_svm_metadata_list and kfree()s each struct criu_svm_metadata\nwithout removing it from the list. The list head is left pointing at\nfreed kmalloc-96 objects.\n\nA second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty()\nreads the dangling ->next (use-after-free), the loop walks freed entries,\nand each is kfree()'d again (double-free). This is reachable by an\nunprivileged render-group user via /dev/kfd with no capabilities required.\n\nAdd list_del() before the kfree() so the list is properly emptied. The\nlist_for_each_entry_safe() iterator already caches the next pointer, so\nunlinking during the walk is safe.\n\n(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)","publishedAt":"2026-08-15T05:56:58.313Z","updatedAt":"2026-10-16T18:55:24.681Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"c8a8d350a273c005a48c64c4519d21b2a51c5ceb","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"506e635aed05dbdeef11e3c59f6e42980cda5b6d","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"838b57b3e7ce8cce0fda56d0861add3d464dd6c8","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"96ac562a9ea3020981f536384711190841c81aa8","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"e33a3bd5cb8d0cf1557dee014115f812c9686130","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"8fa5655da368d0306c03e9dc9cda8ae2a7840926","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_svm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_svm.c"]}],"references":["https://git.kernel.org/stable/c/c8a8d350a273c005a48c64c4519d21b2a51c5ceb","https://git.kernel.org/stable/c/506e635aed05dbdeef11e3c59f6e42980cda5b6d","https://git.kernel.org/stable/c/838b57b3e7ce8cce0fda56d0861add3d464dd6c8","https://git.kernel.org/stable/c/96ac562a9ea3020981f536384711190841c81aa8","https://git.kernel.org/stable/c/e33a3bd5cb8d0cf1557dee014115f812c9686130","https://git.kernel.org/stable/c/8fa5655da368d0306c03e9dc9cda8ae2a7840926"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72449.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72449","state":"PUBLISHED","datePublished":"2026-08-15T05:56:58.313Z","dateUpdated":"2026-10-16T18:55:24.681Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.931Z"},"containers":{"cna":{"title":"drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix list_del corruption in kfd_criu_resume_svm\n\nThe cleanup tail of kfd_criu_resume_svm() walks\nsvms->criu_svm_metadata_list and kfree()s each struct criu_svm_metadata\nwithout removing it from the list. The list head is left pointing at\nfreed kmalloc-96 objects.\n\nA second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty()\nreads the dangling ->next (use-after-free), the loop walks freed entries,\nand each is kfree()'d again (double-free). This is reachable by an\nunprivileged render-group user via /dev/kfd with no capabilities required.\n\nAdd list_del() before the kfree() so the list is properly emptied. The\nlist_for_each_entry_safe() iterator already caches the next pointer, so\nunlinking during the walk is safe.\n\n(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"c8a8d350a273c005a48c64c4519d21b2a51c5ceb","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"506e635aed05dbdeef11e3c59f6e42980cda5b6d","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"838b57b3e7ce8cce0fda56d0861add3d464dd6c8","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"96ac562a9ea3020981f536384711190841c81aa8","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"e33a3bd5cb8d0cf1557dee014115f812c9686130","versionType":"git"},{"version":"2a909ae718715b3bac75d945e38dc0a5e4a0f1ba","status":"affected","lessThan":"8fa5655da368d0306c03e9dc9cda8ae2a7840926","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_svm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_svm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c8a8d350a273c005a48c64c4519d21b2a51c5ceb"},{"url":"https://git.kernel.org/stable/c/506e635aed05dbdeef11e3c59f6e42980cda5b6d"},{"url":"https://git.kernel.org/stable/c/838b57b3e7ce8cce0fda56d0861add3d464dd6c8"},{"url":"https://git.kernel.org/stable/c/96ac562a9ea3020981f536384711190841c81aa8"},{"url":"https://git.kernel.org/stable/c/e33a3bd5cb8d0cf1557dee014115f812c9686130"},{"url":"https://git.kernel.org/stable/c/8fa5655da368d0306c03e9dc9cda8ae2a7840926"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only via the local AMDKFD_IOC_CRIU_OP ioctl on /dev/kfd (unlocked_ioctl -> kfd_ioctl_criu -> criu_resume -> kfd_criu_resume_svm); there is no network, adjacent-radio, or physical-device entry path.\nAC:L - An attacker who can open /dev/kfd controls the full CRIU restore/resume ioctl sequence and can deterministically trigger the bug by issuing KFD_CRIU_OP_RESUME twice after restore populates criu_svm_metadata_list; no uncontrollable race or rare layout is required.\nPR:L - The fix commit and ioctl path show exploitation by a local render-group user opening /dev/kfd; CAP_CHECKPOINT_RESTORE/SYS_ADMIN gates CRIU ioctls but are obtainable in a user namespace, matching basic local user privilege rather than init-namespace root only.\nUI:N - Exploitation requires only the attacker's own ioctl calls to /dev/kfd after CRIU restore; no victim click, mount, file open, or other interactive action is needed.\nS:U - Corruption is confined to kernel heap list metadata in amdkfd for the calling KFD process context; impact stays within the kernel security authority and does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - After the first resume, list_empty() and list iteration dereference freed kmalloc-96 criu_svm_metadata objects (use-after-free reads of ->next/list pointers), enabling attacker-influenced heap disclosure beyond a bounded leak.\nI:H - A second resume walks the corrupted list and kfree()s the same objects again (double-free on kmalloc-96 slabs), a standard exploitable kernel heap primitive for arbitrary memory corruption and potential privilege escalation.\nA:H - The use-after-free and double-free reliably corrupt kernel heap state and commonly cause BUG/KASAN faults, oops, or panic when the dangling list is traversed again, producing system-wide denial of service."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:44:18.630Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-72449","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T18:50:12.270854Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:55:24.681Z"}}]}}}