CVE-2026-80539 (GCVE-0-2026-80539)
Vulnerability from cvelistv5
Published
2026-08-26 14:37
Modified
2026-08-27 12:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: disallow multiple FENCE chunks in one submit
amdgpu_cs_pass1() dispatches on chunk_id once per chunk without
rejecting repeated ids. p->uf_bo is a single-slot field, so a
submission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs
amdgpu_cs_p1_user_fence() twice, and the second run overwrites
p->uf_bo with a freshly referenced BO without dropping the reference
taken by the first.
amdgpu_cs_parser_fini() only unrefs the final p->uf_bo, so every FENCE
chunk but the last leaks a BO reference. The leaked BO outlives handle
close and process exit.
Reject duplicate FENCE chunks the same way commit fec5f8e8c6bc
("drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit") did
for p->bo_list.
(cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 |
||
{
"containers": {
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"drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
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],
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"vendor": "Linux",
"versions": [
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"version": "6.18.46",
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},
{
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"status": "unaffected",
"version": "7.1.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: disallow multiple FENCE chunks in one submit\n\namdgpu_cs_pass1() dispatches on chunk_id once per chunk without\nrejecting repeated ids. p-\u003euf_bo is a single-slot field, so a\nsubmission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs\namdgpu_cs_p1_user_fence() twice, and the second run overwrites\np-\u003euf_bo with a freshly referenced BO without dropping the reference\ntaken by the first.\n\namdgpu_cs_parser_fini() only unrefs the final p-\u003euf_bo, so every FENCE\nchunk but the last leaks a BO reference. The leaked BO outlives handle\nclose and process exit.\n\nReject duplicate FENCE chunks the same way commit fec5f8e8c6bc\n(\"drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit\") did\nfor p-\u003ebo_list.\n\n(cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)"
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T12:40:05.835Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7e9954e7212042ec808b06181b365b14f00c6f0a"
},
{
"url": "https://git.kernel.org/stable/c/070229262ede37d17c4ea596650deb6e5eb5d106"
},
{
"url": "https://git.kernel.org/stable/c/5f46322e0b84af29e10eb951ff45bd6ea40640de"
},
{
"url": "https://git.kernel.org/stable/c/71aa45f7bfe46fbc6f51e7832573ff49b6005fea"
},
{
"url": "https://git.kernel.org/stable/c/e3ee74d6dbbe409eb99546a7b0a02b2782f9021d"
},
{
"url": "https://git.kernel.org/stable/c/931cd1d1baeae68e8eb2c23bc1f3d8934dca6241"
}
],
"title": "drm/amdgpu: disallow multiple FENCE chunks in one submit",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80539",
"datePublished": "2026-08-26T14:37:13.367Z",
"dateReserved": "2026-08-26T14:34:25.765Z",
"dateUpdated": "2026-08-27T12:40:05.835Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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