CVE-2026-80618
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free
amdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpinned DOORBELL and MMIO remap BOs (which are pinned at allocation time) before checking whether the BO is still mapped to the GPU. When the BO is still mapped, the function returns -EBUSY and leaves the BO alive, but it has already been unpinned. The BO is then unpinned again when it is finally freed during process teardown, triggering a ttm_bo_unpin() underflow warning:
Move the unpin after the mapped_to_gpu_memory check so it only happens once we are committed to freeing the BO.
Leer descripción completaMostrar menos
(cherry picked from commit 927c5b2defb9b09856444d94bebfd056a002bd75)
Detalles técnicos trazas, registros y código del informe original
WARNING: CPU: 18 PID: 15066 at ttm/ttm_bo.c:650 amdttm_bo_unpin+0x6d/0x80 [amdttm] Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu] RIP: 0010:amdttm_bo_unpin+0x6d/0x80 [amdttm] Call Trace: amdgpu_bo_unpin+0x1a/0x90 [amdgpu] amdgpu_amdkfd_gpuvm_unpin_bo+0x31/0xb0 [amdgpu] amdgpu_amdkfd_gpuvm_free_memory_of_gpu+0x3bf/0x460 [amdgpu] kfd_process_free_outstanding_kfd_bos+0xd4/0x170 [amdgpu] kfd_process_wq_release+0x109/0x1b0 [amdgpu] process_one_work+0x1e2/0x3b0 worker_thread+0x50/0x3a0 kthread+0xdd/0x100 ret_from_fork+0x29/0x50
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 11
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5
- https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f
- https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e
- https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc
- https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58
- https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-80618",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431",
"lessThan": "461ae406ae12107ebb321cabe561434c27aaea58",
"versionType": "git"
},
{
"status": "affected",
"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431",
"lessThan": "283e77af49fda96aaa57709fc5408b55ffec075e",
"versionType": "git"
},
{
"status": "affected",
"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431",
"lessThan": "c055a2088b719e9a4b580685e0ca97f9554a41a8",
"versionType": "git"
},
{
"status": "affected",
"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431",
"lessThan": "0e27d92f69b8e4c750a4b181cc05a86b9338c4f5",
"versionType": "git"
},
{
"status": "affected",
"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431",
"lessThan": "1d12ae8b079e173107abec0e5817332954c8e95f",
"versionType": "git"
},
{
"status": "affected",
"version": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431",
"lessThan": "3f0cc1735273a57c5116710cf0202e12152f59cc",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-28T08:16:45.823",
"references": [
{
"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",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"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)"
}
],
"lastModified": "2026-08-28T08:16:45.823",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}