{"api_version":"1","generated_at":"2026-08-16T22:28:13+00:00","cve":"CVE-2026-68102","urls":{"html":"https://cve.report/CVE-2026-68102","api":"https://cve.report/api/cve/CVE-2026-68102.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68102","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68102"},"summary":{"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)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:19:54","updated_at":"2026-08-10 13:19:54"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f5988b5c300a32ff751724ffd33d5a8d5873e4a7","name":"https://git.kernel.org/stable/c/f5988b5c300a32ff751724ffd33d5a8d5873e4a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/67bc3647e418e23dc0d17604bdba634a73de809f","name":"https://git.kernel.org/stable/c/67bc3647e418e23dc0d17604bdba634a73de809f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ea772a440d56b285f4d491affac50ecd41f6b402","name":"https://git.kernel.org/stable/c/ea772a440d56b285f4d491affac50ecd41f6b402","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a343d028ad6c174da8dc6af560c51e6d140a6727","name":"https://git.kernel.org/stable/c/a343d028ad6c174da8dc6af560c51e6d140a6727","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa","name":"https://git.kernel.org/stable/c/6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68102","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68102","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d0af8b4def0de6b734ec8db08e96da0458facb6 67bc3647e418e23dc0d17604bdba634a73de809f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d0af8b4def0de6b734ec8db08e96da0458facb6 a343d028ad6c174da8dc6af560c51e6d140a6727 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d0af8b4def0de6b734ec8db08e96da0458facb6 6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d0af8b4def0de6b734ec8db08e96da0458facb6 f5988b5c300a32ff751724ffd33d5a8d5873e4a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d0af8b4def0de6b734ec8db08e96da0458facb6 ea772a440d56b285f4d491affac50ecd41f6b402 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_device.c","drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"67bc3647e418e23dc0d17604bdba634a73de809f","status":"affected","version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","versionType":"git"},{"lessThan":"a343d028ad6c174da8dc6af560c51e6d140a6727","status":"affected","version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","versionType":"git"},{"lessThan":"6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa","status":"affected","version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","versionType":"git"},{"lessThan":"f5988b5c300a32ff751724ffd33d5a8d5873e4a7","status":"affected","version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","versionType":"git"},{"lessThan":"ea772a440d56b285f4d491affac50ecd41f6b402","status":"affected","version":"9d0af8b4def0de6b734ec8db08e96da0458facb6","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_device.c","drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc2","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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)"}],"providerMetadata":{"dateUpdated":"2026-08-10T11:58:18.093Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"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"}],"title":"drm/amdgpu: fix aperture mapping leak","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68102","datePublished":"2026-08-10T11:58:18.093Z","dateReserved":"2026-07-30T09:28:09.368Z","dateUpdated":"2026-08-10T11:58:18.093Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:19:54","lastModifiedDate":"2026-08-10 13:19:54","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68102","Ordinal":"1","Title":"drm/amdgpu: fix aperture mapping leak","CVE":"CVE-2026-68102","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68102","Ordinal":"1","NoteData":"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)","Type":"Description","Title":"drm/amdgpu: fix aperture mapping leak"}]}}}