CVE-2026-74444
drm/vmwgfx: validate DRAW_PRIMITIVES header size before division
Description
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.
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 15, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74444
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to include the fix.
- Validate header size before division in vmw_cmd_draw.
- Prevent out-of-bounds reads of kernel memory.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74444.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74444 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74444
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74444 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74444 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '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-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/2666cddf0dd218aa9bd1f99db688d1b532eac21a Added Reference https://git.kernel.org/stable/c/85891d174707d8bddcec7a888fb4e1d17def34f3 Added Reference https://git.kernel.org/stable/c/c77cf8edae2bd3a1599115301cc7c98d0c78e731 Added Reference https://git.kernel.org/stable/c/dc0be7662b7b0ce28cb5eea864737793ed7b9e70 Added Reference https://git.kernel.org/stable/c/fc0c02f510e41650df3479f96e257acf87d8a20a