{"api_version":"1","generated_at":"2026-09-02T04:26:18+00:00","cve":"CVE-2026-80618","urls":{"html":"https://cve.report/CVE-2026-80618","api":"https://cve.report/api/cve/CVE-2026-80618.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80618","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80618"},"summary":{"title":"drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free\n\namdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpinned DOORBELL and MMIO\nremap BOs (which are pinned at allocation time) before checking whether\nthe BO is still mapped to the GPU. When the BO is still mapped, the\nfunction returns -EBUSY and leaves the BO alive, but it has already\nbeen unpinned. The BO is then unpinned again when it is finally freed\nduring process teardown, triggering a ttm_bo_unpin() underflow warning:\n\n  WARNING: CPU: 18 PID: 15066 at ttm/ttm_bo.c:650 amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\n  RIP: 0010:amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Call Trace:\n   amdgpu_bo_unpin+0x1a/0x90 [amdgpu]\n   amdgpu_amdkfd_gpuvm_unpin_bo+0x31/0xb0 [amdgpu]\n   amdgpu_amdkfd_gpuvm_free_memory_of_gpu+0x3bf/0x460 [amdgpu]\n   kfd_process_free_outstanding_kfd_bos+0xd4/0x170 [amdgpu]\n   kfd_process_wq_release+0x109/0x1b0 [amdgpu]\n   process_one_work+0x1e2/0x3b0\n   worker_thread+0x50/0x3a0\n   kthread+0xdd/0x100\n   ret_from_fork+0x29/0x50\n\nMove the unpin after the mapped_to_gpu_memory check so it only happens\nonce we are committed to freeing the BO.\n\n(cherry picked from commit 927c5b2defb9b09856444d94bebfd056a002bd75)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:45","updated_at":"2026-08-28 08:16:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5","name":"https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f","name":"https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc","name":"https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e","name":"https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8","name":"https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58","name":"https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80618","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80618","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d25e35bc26c3ca8cd728101545cfb3e86a5d7431 461ae406ae12107ebb321cabe561434c27aaea58 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d25e35bc26c3ca8cd728101545cfb3e86a5d7431 283e77af49fda96aaa57709fc5408b55ffec075e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d25e35bc26c3ca8cd728101545cfb3e86a5d7431 c055a2088b719e9a4b580685e0ca97f9554a41a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d25e35bc26c3ca8cd728101545cfb3e86a5d7431 0e27d92f69b8e4c750a4b181cc05a86b9338c4f5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d25e35bc26c3ca8cd728101545cfb3e86a5d7431 1d12ae8b079e173107abec0e5817332954c8e95f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d25e35bc26c3ca8cd728101545cfb3e86a5d7431 3f0cc1735273a57c5116710cf0202e12152f59cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80618","cve":"CVE-2026-80618","epss":"0.001720000","percentile":"0.067790000","score_date":"2026-08-30","updated_at":"2026-08-31 00:14:06"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"461ae406ae12107ebb321cabe561434c27aaea58","status":"affected","version":"d25e35bc26c3ca8cd728101545cfb3e86a5d7431","versionType":"git"},{"lessThan":"283e77af49fda96aaa57709fc5408b55ffec075e","status":"affected","version":"d25e35bc26c3ca8cd728101545cfb3e86a5d7431","versionType":"git"},{"lessThan":"c055a2088b719e9a4b580685e0ca97f9554a41a8","status":"affected","version":"d25e35bc26c3ca8cd728101545cfb3e86a5d7431","versionType":"git"},{"lessThan":"0e27d92f69b8e4c750a4b181cc05a86b9338c4f5","status":"affected","version":"d25e35bc26c3ca8cd728101545cfb3e86a5d7431","versionType":"git"},{"lessThan":"1d12ae8b079e173107abec0e5817332954c8e95f","status":"affected","version":"d25e35bc26c3ca8cd728101545cfb3e86a5d7431","versionType":"git"},{"lessThan":"3f0cc1735273a57c5116710cf0202e12152f59cc","status":"affected","version":"d25e35bc26c3ca8cd728101545cfb3e86a5d7431","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.17"},{"lessThan":"5.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free\n\namdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpinned DOORBELL and MMIO\nremap BOs (which are pinned at allocation time) before checking whether\nthe BO is still mapped to the GPU. When the BO is still mapped, the\nfunction returns -EBUSY and leaves the BO alive, but it has already\nbeen unpinned. The BO is then unpinned again when it is finally freed\nduring process teardown, triggering a ttm_bo_unpin() underflow warning:\n\n  WARNING: CPU: 18 PID: 15066 at ttm/ttm_bo.c:650 amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\n  RIP: 0010:amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Call Trace:\n   amdgpu_bo_unpin+0x1a/0x90 [amdgpu]\n   amdgpu_amdkfd_gpuvm_unpin_bo+0x31/0xb0 [amdgpu]\n   amdgpu_amdkfd_gpuvm_free_memory_of_gpu+0x3bf/0x460 [amdgpu]\n   kfd_process_free_outstanding_kfd_bos+0xd4/0x170 [amdgpu]\n   kfd_process_wq_release+0x109/0x1b0 [amdgpu]\n   process_one_work+0x1e2/0x3b0\n   worker_thread+0x50/0x3a0\n   kthread+0xdd/0x100\n   ret_from_fork+0x29/0x50\n\nMove the unpin after the mapped_to_gpu_memory check so it only happens\nonce we are committed to freeing the BO.\n\n(cherry picked from commit 927c5b2defb9b09856444d94bebfd056a002bd75)"}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:38.112Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58"},{"url":"https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e"},{"url":"https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8"},{"url":"https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5"},{"url":"https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f"},{"url":"https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc"}],"title":"drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80618","datePublished":"2026-08-28T06:48:38.112Z","dateReserved":"2026-08-26T14:34:25.774Z","dateUpdated":"2026-08-28T06:48:38.112Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:45","lastModifiedDate":"2026-08-28 08:16:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80618","Ordinal":"1","Title":"drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free","CVE":"CVE-2026-80618","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80618","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free\n\namdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpinned DOORBELL and MMIO\nremap BOs (which are pinned at allocation time) before checking whether\nthe BO is still mapped to the GPU. When the BO is still mapped, the\nfunction returns -EBUSY and leaves the BO alive, but it has already\nbeen unpinned. The BO is then unpinned again when it is finally freed\nduring process teardown, triggering a ttm_bo_unpin() underflow warning:\n\n  WARNING: CPU: 18 PID: 15066 at ttm/ttm_bo.c:650 amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\n  RIP: 0010:amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Call Trace:\n   amdgpu_bo_unpin+0x1a/0x90 [amdgpu]\n   amdgpu_amdkfd_gpuvm_unpin_bo+0x31/0xb0 [amdgpu]\n   amdgpu_amdkfd_gpuvm_free_memory_of_gpu+0x3bf/0x460 [amdgpu]\n   kfd_process_free_outstanding_kfd_bos+0xd4/0x170 [amdgpu]\n   kfd_process_wq_release+0x109/0x1b0 [amdgpu]\n   process_one_work+0x1e2/0x3b0\n   worker_thread+0x50/0x3a0\n   kthread+0xdd/0x100\n   ret_from_fork+0x29/0x50\n\nMove the unpin after the mapped_to_gpu_memory check so it only happens\nonce we are committed to freeing the BO.\n\n(cherry picked from commit 927c5b2defb9b09856444d94bebfd056a002bd75)","Type":"Description","Title":"drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free"}]}}}