{"id":"CVE-2026-68104","state":"PUBLISHED","title":"drm/amdgpu: invoke pm_genpd_remove() before freeing genpd","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: invoke pm_genpd_remove() before freeing genpd\n\nCall pm_genpd_remove() to unregister from global list prior to releasing\nacp_genpd memory, and clear the pointer after free.\n\n(cherry picked from commit cd8650d7a91ee8b768e202354672553faa5cc1f2)","publishedAt":"2026-08-10T11:58:20.614Z","updatedAt":"2026-10-19T20:58:50.663Z","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":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"4d7c10b0bf09d90c81818752decbdb1966b62702","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"493adf29d66f23888f0e29888b6bc9512acd0825","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"2e406b86144c1f732eb344f1f1e09043856cfc33","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"bdfc7f1e0900ef1361b828c4f69b72701f8a0a86","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"5c0a82283271759fff445ac27182072f200a888c","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"08fee493e0261f9e4120a5c8e7e42e8a723574e8","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"930a5dc3df4aa5e10393134bd5313d616dbebaf6","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"28c9b3c5dc35cc790d11e26ca3fc6e068be63998","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.6","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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/amdgpu/amdgpu_acp.c"]}],"references":["https://git.kernel.org/stable/c/4d7c10b0bf09d90c81818752decbdb1966b62702","https://git.kernel.org/stable/c/493adf29d66f23888f0e29888b6bc9512acd0825","https://git.kernel.org/stable/c/2e406b86144c1f732eb344f1f1e09043856cfc33","https://git.kernel.org/stable/c/bdfc7f1e0900ef1361b828c4f69b72701f8a0a86","https://git.kernel.org/stable/c/5c0a82283271759fff445ac27182072f200a888c","https://git.kernel.org/stable/c/08fee493e0261f9e4120a5c8e7e42e8a723574e8","https://git.kernel.org/stable/c/930a5dc3df4aa5e10393134bd5313d616dbebaf6","https://git.kernel.org/stable/c/28c9b3c5dc35cc790d11e26ca3fc6e068be63998"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68104.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68104","state":"PUBLISHED","datePublished":"2026-08-10T11:58:20.614Z","dateUpdated":"2026-10-19T20:58:50.663Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.368Z"},"containers":{"cna":{"title":"drm/amdgpu: invoke pm_genpd_remove() before freeing genpd","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: invoke pm_genpd_remove() before freeing genpd\n\nCall pm_genpd_remove() to unregister from global list prior to releasing\nacp_genpd memory, and clear the pointer after free.\n\n(cherry picked from commit cd8650d7a91ee8b768e202354672553faa5cc1f2)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"4d7c10b0bf09d90c81818752decbdb1966b62702","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"493adf29d66f23888f0e29888b6bc9512acd0825","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"2e406b86144c1f732eb344f1f1e09043856cfc33","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"bdfc7f1e0900ef1361b828c4f69b72701f8a0a86","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"5c0a82283271759fff445ac27182072f200a888c","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"08fee493e0261f9e4120a5c8e7e42e8a723574e8","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"930a5dc3df4aa5e10393134bd5313d616dbebaf6","versionType":"git"},{"version":"25030321ba2860c56651429a4f28d94a6483d952","status":"affected","lessThan":"28c9b3c5dc35cc790d11e26ca3fc6e068be63998","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.6","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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/amdgpu/amdgpu_acp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4d7c10b0bf09d90c81818752decbdb1966b62702"},{"url":"https://git.kernel.org/stable/c/493adf29d66f23888f0e29888b6bc9512acd0825"},{"url":"https://git.kernel.org/stable/c/2e406b86144c1f732eb344f1f1e09043856cfc33"},{"url":"https://git.kernel.org/stable/c/bdfc7f1e0900ef1361b828c4f69b72701f8a0a86"},{"url":"https://git.kernel.org/stable/c/5c0a82283271759fff445ac27182072f200a888c"},{"url":"https://git.kernel.org/stable/c/08fee493e0261f9e4120a5c8e7e42e8a723574e8"},{"url":"https://git.kernel.org/stable/c/930a5dc3df4aa5e10393134bd5313d616dbebaf6"},{"url":"https://git.kernel.org/stable/c/28c9b3c5dc35cc790d11e26ca3fc6e068be63998"}],"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 in acp_hw_fini during amdgpu driver teardown (amdgpu_pci_remove/amdgpu_driver_unload_kms), reachable via local PCI unbind/module unload or a failed amdgpu init cleanup after opening a DRM render node; there is no network-facing entry point.\nAC:L - Once the AMDGPU ACP block has been initialized, calling acp_hw_fini deterministically frees acp_genpd without unregistering it from the global genpd list; no race or special memory layout is required to leave a dangling list entry.\nPR:L - Unprivileged users with access to /dev/dri/renderD* can autoload amdgpu and trigger the fini path if initialization fails after ACP setup; the same bug also fires on privileged driver unload/hot-unplug teardown of AMDGPU on ACP-capable APUs (Carrizo/Stoney).\nUI:N - Exploitation does not require any victim interaction such as clicking links or mounting filesystems; triggering driver teardown or a failed init cleanup is sufficient once the attacker can open the DRM device or unload the driver.\nS:U - The use-after-free corrupts kernel heap metadata/objects in the same kernel security domain during AMDGPU/ACP teardown; it does not by itself cross VM, container, or IOMMU boundaries to impact a separate authority.\nC:H - Freeing the generic_pm_domain while it remains linked on the global gpd_list is a kernel use-after-free; subsequent genpd list walks can read attacker-influenced freed memory, enabling information disclosure and kernel pointer leaks.\nI:H - The dangling genpd entry allows the power-domain core to perform reads/writes through a freed acp_pm_domain/generic_pm_domain object, providing a standard heap UAF primitive that can be developed into arbitrary kernel memory corruption or code execution.\nA:H - Dereferencing the freed genpd from the global list during later power-management operations can cause kernel oops/panic or hang, and the UAF can be leveraged for a reliable denial-of-service even when full exploitation is not attempted."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:29:17.502Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-68104","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:43:52.011582Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","type":"CWE","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:58:50.663Z"}}]}}}