drm/vmwgfx: bound DMA command body size against suffix pointer
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: bound DMA command body size against suffix pointer vmw_cmd_dma() locates the DMA suffix at (unsigned long) &cmd->body + header->size - sizeof(*suffix) without checking that header->size is large enough to contain both cmd->body and the suffix. An undersized header makes the suffix pointer underflow back into the previous command in the bounce buffer. The verifier later writes suffix->maximumOffset, clobbering verified fields of an already-relocated earlier command -- a TOCTOU on the device-visible command stream that lets one command rewrite another's GMR id, surface id, or other authenticated fields. Reject the command if the body is too small for the suffix to fit.
CVE-2026-74443
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-2026-74443
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": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "eb20f418933bea53375843b27b4022c1810be63b",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "fcd1e56e7816b31a1050ccc67df722b20f6bb15d",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "a4a37080a5ac777b59306cfcdf854cc05d7604d4",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "036e16ada95389bdc30f41068af04c1d0872fad0",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "d5d7ada4e1296b00d89fe82b2ca850cc7809d6f7",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "7e40e6120fb232a10b543ffd994e5c6d8f3a2cc6",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "9759da60e38d7b9db44dc92713e4e0391883d221",
"versionType": "git"
},
{
"status": "affected",
"version": "4e4ddd47774313accc86b233d6ca2c6a9037a671",
"lessThan": "f4f1db96bfd68b81053693ba53405b6f510ac16c",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.33"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.33",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74443
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33153 · Revision 1
- Added to Heist Feed
- Publisher date