{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68245", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.377Z", "datePublished": "2026-08-10T12:01:11.501Z", "dateUpdated": "2026-08-18T06:55:46.886Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-18T06:55:46.886Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()\n\nThe vm pointer returned from amdgpu_vm_get_vm_from_pasid() is only\nvalid while the lock is still being held. Once xa_unlock_irqrestore is\ncalled and returned, the pointer is no longer under lock and is subject\nto modification. Since, the caller still dereferences vm->task_info in\namdgpu_vm_get_task_info_vm() after the lock is removed, this causes a\nuse after unlock problem.\n\nRemove the lifetime issue present in amdgpu_vm_get_task_info_pasid()\nthrough removing the amdgpu_vm_get_vm_from_pasid() function from\namdgpu_vm.c and making the relevant code inline to hold the lock while\nit is still in use.\n\n(cherry picked from commit 9d01579f3f868b333acc901815972685989092c7)" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable code is reached through the amdgpu DRM device (render node) via command submission causing a GPU VM page fault or a ring timeout; this requires local access to /dev/dri/renderD*, with no network exposure.\nAC:L - The attacker controls both sides of the race: it can generate GPU page faults or job timeouts at will while concurrently closing DRM file descriptors to free the amdgpu_vm/fpriv, and can retry the race arbitrarily many times until it wins.\nPR:L - Only an unprivileged local account with access to the AMD GPU render node is needed; render nodes are world/group accessible by default on desktop, Android and container workloads, and no capability is checked on the CS/fault path.\nUI:N - The attacker's own processes generate the GPU faults and the concurrent VM teardown; no action by any other user is required.\nS:U - The corruption stays within the kernel's own security authority — the freed amdgpu_vm/amdgpu_task_info are kernel heap objects, with no crossing of a VM or IOMMU boundary.\nC:H - The stale vm pointer is dereferenced after free, reading vm->task_info out of reallocated kernel heap memory, and the resulting task_info contents (process name, pid, tgid) are then printed/exported, allowing disclosure of attacker-groomed or unrelated kernel data.\nI:H - kref_get() is performed on memory that may already be freed and reallocated, writing an increment into another object's fields, and the paired kref_put() can drop a foreign refcount to zero — a classic use-after-free/refcount-corruption primitive leveraged for arbitrary write and privilege escalation.\nA:H - The use-after-free occurs in a GPU interrupt handler and the reset/timeout path; dereferencing freed memory or corrupting a reused slab object readily oopses or panics the kernel, and it can be retriggered repeatedly." } ] } ], "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_vm.c" ], "versions": [ { "version": "b8f67b9ddf4f8fe6dd536590712b5912ad78f99c", "lessThan": "fe16a7e5336ae888751984e30c451fbf7cfa5df7", "status": "affected", "versionType": "git" }, { "version": "b8f67b9ddf4f8fe6dd536590712b5912ad78f99c", "lessThan": "1173190412fb9d12e7efce76734118d9712ff970", "status": "affected", "versionType": "git" }, { "version": "b8f67b9ddf4f8fe6dd536590712b5912ad78f99c", "lessThan": "5d5fb9124a2bba96a7807086d8fe0f7ce810d546", "status": "affected", "versionType": "git" }, { "version": "b8f67b9ddf4f8fe6dd536590712b5912ad78f99c", "lessThan": "04cc4aa3617b0ed67e859f91f09de5d896a46f3a", "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_vm.c" ], "versions": [ { "version": "6.9", "status": "affected" }, { "version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "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": "6.9", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/fe16a7e5336ae888751984e30c451fbf7cfa5df7" }, { "url": "https://git.kernel.org/stable/c/1173190412fb9d12e7efce76734118d9712ff970" }, { "url": "https://git.kernel.org/stable/c/5d5fb9124a2bba96a7807086d8fe0f7ce810d546" }, { "url": "https://git.kernel.org/stable/c/04cc4aa3617b0ed67e859f91f09de5d896a46f3a" } ], "title": "drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()", "x_generator": { "engine": "bippy-1.2.0" } } } }