CVE-2026-80618

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80618", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.774Z", "datePublished": "2026-08-28T06:48:38.112Z", "dateUpdated": "2026-08-28T06:48:38.112Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:48:38.112Z"}, "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)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"], "versions": [{"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431", "lessThan": "461ae406ae12107ebb321cabe561434c27aaea58", "status": "affected", "versionType": "git"}, {"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431", "lessThan": "283e77af49fda96aaa57709fc5408b55ffec075e", "status": "affected", "versionType": "git"}, {"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431", "lessThan": "c055a2088b719e9a4b580685e0ca97f9554a41a8", "status": "affected", "versionType": "git"}, {"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431", "lessThan": "0e27d92f69b8e4c750a4b181cc05a86b9338c4f5", "status": "affected", "versionType": "git"}, {"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431", "lessThan": "1d12ae8b079e173107abec0e5817332954c8e95f", "status": "affected", "versionType": "git"}, {"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431", "lessThan": "3f0cc1735273a57c5116710cf0202e12152f59cc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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)"}], "id": "CVE-2026-80618", "lastModified": "2026-08-28T08:16:45.823", "metrics": {}, "published": "2026-08-28T08:16:45.823", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free", "id": "2525378", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525378"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-832", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free\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:\nWARNING: CPU: 18 PID: 15066 at ttm/ttm_bo.c:650 amdttm_bo_unpin+0x6d/0x80 [amdttm]\nWorkqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\nRIP: 0010:amdttm_bo_unpin+0x6d/0x80 [amdttm]\nCall Trace:\namdgpu_bo_unpin+0x1a/0x90 [amdgpu]\namdgpu_amdkfd_gpuvm_unpin_bo+0x31/0xb0 [amdgpu]\namdgpu_amdkfd_gpuvm_free_memory_of_gpu+0x3bf/0x460 [amdgpu]\nkfd_process_free_outstanding_kfd_bos+0xd4/0x170 [amdgpu]\nkfd_process_wq_release+0x109/0x1b0 [amdgpu]\nprocess_one_work+0x1e2/0x3b0\nworker_thread+0x50/0x3a0\nkthread+0xdd/0x100\nret_from_fork+0x29/0x50\nMove the unpin after the mapped_to_gpu_memory check so it only happens\nonce we are committed to freeing the BO.\n(cherry picked from commit 927c5b2defb9b09856444d94bebfd056a002bd75)", "A flaw was found in the kernel's AMD GPU driver (drm/amdkfd). This vulnerability occurs when the driver attempts to unpin a memory buffer object (BO) twice during memory deallocation. A local attacker could exploit this double-unpin operation, leading to a memory management error. This issue can cause system instability or a denial of service (DoS)."], "name": "CVE-2026-80618", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80618\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80618\nhttps://lore.kernel.org/linux-cve-announce/2026082835-CVE-2026-80618-5d17@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d25e35bc26c3ca8cd728101545cfb3e86a5d7431,461ae406ae12107ebb321cabe561434c27aaea58)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d25e35bc26c3ca8cd728101545cfb3e86a5d7431,283e77af49fda96aaa57709fc5408b55ffec075e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d25e35bc26c3ca8cd728101545cfb3e86a5d7431,c055a2088b719e9a4b580685e0ca97f9554a41a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d25e35bc26c3ca8cd728101545cfb3e86a5d7431,0e27d92f69b8e4c750a4b181cc05a86b9338c4f5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d25e35bc26c3ca8cd728101545cfb3e86a5d7431,1d12ae8b079e173107abec0e5817332954c8e95f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d25e35bc26c3ca8cd728101545cfb3e86a5d7431,3f0cc1735273a57c5116710cf0202e12152f59cc)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.178,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.97,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.40,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-28T10:00:06.042659+00:00", "updated": "2026-08-31T17:00:03.770325+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}