drm/amdgpu: reject oversized IBs with per-ring packet limits
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: reject oversized IBs with per-ring packet limits On GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through to ib->length_dw without a limit, while ring_emit_ib() encodes length into packet fields. Oversized values can corrupt adjacent control bits and destabilize command submission. Add a per-ring IB packet size limit helper and reject command submissions exceeding the corresponding dword limit before IB allocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE, and apply the MM fallback limit for other ring types. (cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)
CVE-2026-80576
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80576
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
"lessThan": "67a5d905c17a5066b0f6f950da11da93d56d122b",
"versionType": "git"
},
{
"status": "affected",
"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
"lessThan": "6e164ba1057175fb8a370d8e05cbff5c57eac0c8",
"versionType": "git"
},
{
"status": "affected",
"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
"lessThan": "1474f3970d1afd303e12ff14d06808eabb371576",
"versionType": "git"
},
{
"status": "affected",
"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
"lessThan": "07fe270ec07c138a70afe7a81e115a85c35c545c",
"versionType": "git"
},
{
"status": "affected",
"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
"lessThan": "fd37f9dd5b5ab70a46fa7bc76623c0528d602b27",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.105",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.46",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80576
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46606 · Revision 1
- Added to Heist Feed
- Publisher date