drm/vmwgfx: validate DRAW_PRIMITIVES header size before division
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate DRAW_PRIMITIVES header size before division vmw_cmd_draw() computes maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl); where header->size is u32 and is taken straight from the user-supplied command stream. When header->size is less than sizeof(cmd->body) the unsigned subtraction wraps to nearly 4 GiB, producing a huge maxnum. Any user-controlled cmd->body.numVertexDecls then passes the bound and the loop dereferences decl[i] far past the end of the kernel command bounce buffer, producing an out-of-bounds read of kernel memory. Reject undersized headers up front.
CVE-2026-74444
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-2026-74444
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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "b89ca4bba820f79dde52af15ee139fe6e8bbc314",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "bef30317fcb4c838a37bceb2fc76256eb6b975c1",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "112c6ff29a56f3a22db4d5af869697aa07035ad6",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "2666cddf0dd218aa9bd1f99db688d1b532eac21a",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "fc0c02f510e41650df3479f96e257acf87d8a20a",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "dc0be7662b7b0ce28cb5eea864737793ed7b9e70",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "c77cf8edae2bd3a1599115301cc7c98d0c78e731",
"versionType": "git"
},
{
"status": "affected",
"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
"lessThan": "85891d174707d8bddcec7a888fb4e1d17def34f3",
"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-2026-74444
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33154 · Revision 1
- Added to Heist Feed
- Publisher date