205 lines
10 KiB
JSON
205 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-46311",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-13T15:03:33.111Z",
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"datePublished": "2026-06-08T15:50:41.866Z",
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"dateUpdated": "2026-10-19T19:36:57.524Z"
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},
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-15T10:07:29.121Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: fix access to stale wptr mapping\n\nUse drm_exec to take both locks i.e vm root bo and\nwptr_obj bo to access the mapping data properly.\n\nThis fixes the security issue of unmap the wptr_obj while\na queue creation is in progress and passing other\nbo at same address.\n\n(cherry picked from commit 1fc6c8ab45dbee096469c08c13f6099d57a52d6c)"
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}
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],
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"metrics": [
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{
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is reached only through local DRM ioctls (DRM_IOCTL_AMDGPU_USERQ and DRM_IOCTL_AMDGPU_GEM_VA) on an AMDGPU render node (/dev/dri/renderD*), not via any network-facing path.\nAC:L - An attacker controls both sides of the race by running concurrent threads that issue USERQ_CREATE and GEM_VA UNMAP/REPLACE on the same wptr VA; 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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/amdgpu/mes_userqueue.c"
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],
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"versions": [
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{
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"lessThan": "2da62dbb4169e758c0b1a9378b39a373bf4fb111",
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"status": "affected",
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{
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"product": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/amdgpu/mes_userqueue.c"
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],
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"versions": [
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{
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"version": "6.16",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.16",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.9",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"negate": false,
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2da62dbb4169e758c0b1a9378b39a373bf4fb111"
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},
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{
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"url": "https://git.kernel.org/stable/c/336a9186f3a4b65bbd865d93936605ac8a1a3991"
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},
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{
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"url": "https://git.kernel.org/stable/c/6da7b1242da4455b11c24ce667d1cab1a348c8ea"
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}
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],
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"title": "drm/amdgpu/userq: fix access to stale wptr mapping",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-46311",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:21:50.965038Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-362",
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"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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