CVE-2026-46311

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amdgpu_vm_bo_unmap proceeds even when userq_va_mapped is set, making the window reliably triggerable.\nPR:L - Exploitation requires only access to the AMDGPU render node (DRM_AUTH|DRM_RENDER_ALLOW), which is available to unprivileged local users in the render/video group, not real root in the init namespace.\nUI:N - No victim interaction is required; the attacker automates the race with concurrent ioctl calls from their own process.\nS:U - The vulnerability corrupts kernel driver state and can lead to standard local kernel privilege escalation; it does not cross a VM, sandbox, or IOMMU security boundary.\nC:H - Operating on a stale BO pointer without holding locks can cause use-after-free and use attacker-replaced mappings, enabling arbitrary kernel memory disclosure through freed-object reuse and GART mapping confusion.\nI:H - The stale BO can be pinned and mapped into GART while a different BO occupies the VA, letting GPU firmware track wptr at the wrong physical address and enabling kernel heap corruption via UAF on amdgpu_bo structures.\nA:H - Use-after-free on BO reservation/pinning can kernel-oops the system, and incorrect wptr GART setup can hang or reset the GPU during queue scheduling."}]}], "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/mes_userqueue.c"], "versions": [{"version": "5fb2f7fc21a3668e5794cc0d153641b9719713e1", "lessThan": "2da62dbb4169e758c0b1a9378b39a373bf4fb111", "status": "affected", "versionType": "git"}, {"version": "5fb2f7fc21a3668e5794cc0d153641b9719713e1", "lessThan": "336a9186f3a4b65bbd865d93936605ac8a1a3991", "status": "affected", "versionType": "git"}, {"version": "5fb2f7fc21a3668e5794cc0d153641b9719713e1", "lessThan": "6da7b1242da4455b11c24ce667d1cab1a348c8ea", "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/mes_userqueue.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.16", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2da62dbb4169e758c0b1a9378b39a373bf4fb111"}, {"url": "https://git.kernel.org/stable/c/336a9186f3a4b65bbd865d93936605ac8a1a3991"}, {"url": "https://git.kernel.org/stable/c/6da7b1242da4455b11c24ce667d1cab1a348c8ea"}], "title": "drm/amdgpu/userq: fix access to stale wptr mapping", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46311", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:21:50.965038Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:36:57.524Z"}}]}}

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