{"id":"CVE-2026-68102","state":"PUBLISHED","title":"drm/amdgpu: fix aperture mapping leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix aperture mapping leak\n\namdgpu_pci_remove() calls drm_dev_unplug() before invoking the driver\nfini routines. This causes drm_dev_enter() in amdgpu_ttm_fini() to\nalways return false, so iounmap(aper_base_kaddr) never runs on normal\ndriver unload, leaving an orphaned entry in the x86 PAT interval tree.\n\nOn connected_to_cpu hardware, the aperture is mapped write-back (WB) via\nioremap_cache(). On reload, IP discovery calls memremap(..., MEMREMAP_WC)\nover the same range. The WC vs WB conflict causes:\n\n  ioremap error for 0x..., requested 0x1, got 0x0\n  amdgpu: discovery failed: -2\n\nFix by switching to devres-managed mappings so cleanup is guaranteed\nregardless of drm_dev_enter() state:\n\n- connected_to_cpu path: devm_memremap(MEMREMAP_WB). For\n  IORESOURCE_SYSTEM_RAM ranges this takes the try_ram_remap() shortcut,\n  returning __va(offset) from the existing kernel direct map. No new\n  ioremap VA or PAT entry is created, so there is nothing to orphan.\n\n- dGPU path: devm_ioremap_wc() registers iounmap() as a devres action,\n  guaranteeing cleanup at device_del() time.\n\nAlso remove iounmap(aper_base_kaddr) from amdgpu_device_unmap_mmio()\nsince the mapping is now devres-owned.\n\nv2: Remove redundant x86_64 guard (Lijo)\n\n(cherry picked from commit d871e99879cb5fd1fa798b006b4888887e63a17a)","publishedAt":"2026-08-10T11:58:18.093Z","updatedAt":"2026-10-30T12:28:04.267Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"8cf4724ea4f23c438af87a6cd0582a3372d30da9","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"67bc3647e418e23dc0d17604bdba634a73de809f","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"a343d028ad6c174da8dc6af560c51e6d140a6727","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"f5988b5c300a32ff751724ffd33d5a8d5873e4a7","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"ea772a440d56b285f4d491affac50ecd41f6b402","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_device.c","drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"6.1.191","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_device.c","drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"]}],"references":["https://git.kernel.org/stable/c/8cf4724ea4f23c438af87a6cd0582a3372d30da9","https://git.kernel.org/stable/c/67bc3647e418e23dc0d17604bdba634a73de809f","https://git.kernel.org/stable/c/a343d028ad6c174da8dc6af560c51e6d140a6727","https://git.kernel.org/stable/c/6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa","https://git.kernel.org/stable/c/f5988b5c300a32ff751724ffd33d5a8d5873e4a7","https://git.kernel.org/stable/c/ea772a440d56b285f4d491affac50ecd41f6b402"],"weaknesses":[],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68102.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68102","state":"PUBLISHED","datePublished":"2026-08-10T11:58:18.093Z","dateUpdated":"2026-10-30T12:28:04.267Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.368Z"},"containers":{"cna":{"title":"drm/amdgpu: fix aperture mapping leak","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix aperture mapping leak\n\namdgpu_pci_remove() calls drm_dev_unplug() before invoking the driver\nfini routines. This causes drm_dev_enter() in amdgpu_ttm_fini() to\nalways return false, so iounmap(aper_base_kaddr) never runs on normal\ndriver unload, leaving an orphaned entry in the x86 PAT interval tree.\n\nOn connected_to_cpu hardware, the aperture is mapped write-back (WB) via\nioremap_cache(). On reload, IP discovery calls memremap(..., MEMREMAP_WC)\nover the same range. The WC vs WB conflict causes:\n\n  ioremap error for 0x..., requested 0x1, got 0x0\n  amdgpu: discovery failed: -2\n\nFix by switching to devres-managed mappings so cleanup is guaranteed\nregardless of drm_dev_enter() state:\n\n- connected_to_cpu path: devm_memremap(MEMREMAP_WB). For\n  IORESOURCE_SYSTEM_RAM ranges this takes the try_ram_remap() shortcut,\n  returning __va(offset) from the existing kernel direct map. No new\n  ioremap VA or PAT entry is created, so there is nothing to orphan.\n\n- dGPU path: devm_ioremap_wc() registers iounmap() as a devres action,\n  guaranteeing cleanup at device_del() time.\n\nAlso remove iounmap(aper_base_kaddr) from amdgpu_device_unmap_mmio()\nsince the mapping is now devres-owned.\n\nv2: Remove redundant x86_64 guard (Lijo)\n\n(cherry picked from commit d871e99879cb5fd1fa798b006b4888887e63a17a)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"8cf4724ea4f23c438af87a6cd0582a3372d30da9","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"67bc3647e418e23dc0d17604bdba634a73de809f","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"a343d028ad6c174da8dc6af560c51e6d140a6727","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"f5988b5c300a32ff751724ffd33d5a8d5873e4a7","versionType":"git"},{"version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","status":"affected","lessThan":"ea772a440d56b285f4d491affac50ecd41f6b402","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_device.c","drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"6.1.191","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_device.c","drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8cf4724ea4f23c438af87a6cd0582a3372d30da9"},{"url":"https://git.kernel.org/stable/c/67bc3647e418e23dc0d17604bdba634a73de809f"},{"url":"https://git.kernel.org/stable/c/a343d028ad6c174da8dc6af560c51e6d140a6727"},{"url":"https://git.kernel.org/stable/c/6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa"},{"url":"https://git.kernel.org/stable/c/f5988b5c300a32ff751724ffd33d5a8d5873e4a7"},{"url":"https://git.kernel.org/stable/c/ea772a440d56b285f4d491affac50ecd41f6b402"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:28:04.267Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}