drm/vmwgfx: fix guest_memory_dirty bitfield clobbered as size
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: fix guest_memory_dirty bitfield clobbered as size Two sites in vmwgfx_resource.c assign boolean literals to res->guest_memory_size, which is an unsigned long allocation-size field; the intended target is the adjacent res->guest_memory_dirty bitfield. After the assignments the field holds 0 or 1 instead of the resource's MOB allocation size: - vmw_resource_release() writes 0 (false), and - vmw_resource_unbind_list() writes 1 (true). Subsequent revalidation paths read guest_memory_size when computing the dirty page range (vmw_bo_dirty_transfer_to_res()) and the buffer allocation size (vmw_resource_buf_alloc()), producing zero-length walks or wrap-around ranges that read or write past the MOB bitmap. The dirty-tracking intent of the original code (mark the resource as dirtied since the last sync) is also lost, since guest_memory_dirty is never updated. Rename both assignments to guest_memory_dirty.
CVE-2026-80702
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-2026-80702
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": "668b206601c5f5063e03b76784a0d3024fa2b249",
"lessThan": "21bbe38faee4a195d33a93e3908e307807f7745d",
"versionType": "git"
},
{
"status": "affected",
"version": "668b206601c5f5063e03b76784a0d3024fa2b249",
"lessThan": "9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6",
"versionType": "git"
},
{
"status": "affected",
"version": "668b206601c5f5063e03b76784a0d3024fa2b249",
"lessThan": "282f261cb035e5f01a486f76d356b7e9dbfba73f",
"versionType": "git"
},
{
"status": "affected",
"version": "668b206601c5f5063e03b76784a0d3024fa2b249",
"lessThan": "3b2bb16a5b622867140d69925db411ac8ecb3b2b",
"versionType": "git"
},
{
"status": "affected",
"version": "668b206601c5f5063e03b76784a0d3024fa2b249",
"lessThan": "83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"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_resource.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80702
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34362 · Revision 1
- Added to Heist Feed
- Publisher date