CVE-2026-74444

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Source
https://cve.org/CVERecord?id=CVE-2026-74444
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74444.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-74444
Downstream
Published
2026-08-15T12:26:51Z
Modified
2026-08-21T03:30:21Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
drm/vmwgfx: validate DRAW_PRIMITIVES header size before division
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74444.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
7a73ba7469cbea631050094fd14f73acebb97cf9
Fixed
b89ca4bba820f79dde52af15ee139fe6e8bbc314
Fixed
bef30317fcb4c838a37bceb2fc76256eb6b975c1
Fixed
112c6ff29a56f3a22db4d5af869697aa07035ad6
Fixed
2666cddf0dd218aa9bd1f99db688d1b532eac21a
Fixed
fc0c02f510e41650df3479f96e257acf87d8a20a
Fixed
dc0be7662b7b0ce28cb5eea864737793ed7b9e70
Fixed
c77cf8edae2bd3a1599115301cc7c98d0c78e731
Fixed
85891d174707d8bddcec7a888fb4e1d17def34f3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74444.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.33
Fixed
5.10.265
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.216
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.183
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.151
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.103
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.44
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74444.json"