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CVE-2026-74444

HIGHCVSS 7.8/10EPSS 0.13%

Last modified

CVE-2026-74444 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.13%

3.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 7a73ba7469cbea631050094fd14f73acebb97cf9, < b89ca4bba820f79dde52af15ee139fe6e8bbc314; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < bef30317fcb4c838a37bceb2fc76256eb6b975c1; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < 112c6ff29a56f3a22db4d5af869697aa07035ad6; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < 2666cddf0dd218aa9bd1f99db688d1b532eac21a; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < fc0c02f510e41650df3479f96e257acf87d8a20a; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < dc0be7662b7b0ce28cb5eea864737793ed7b9e70; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < c77cf8edae2bd3a1599115301cc7c98d0c78e731; >= 7a73ba7469cbea631050094fd14f73acebb97cf9, < 85891d174707d8bddcec7a888fb4e1d17def34f3
LinuxLinux2.6.33

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74444?
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.
How severe is CVE-2026-74444?
CVE-2026-74444 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74444?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST