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CVE-2026-74444

drm/vmwgfx: validate DRAW_PRIMITIVES header size before division

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in b89ca4bba820f79dde52af15ee139fe6e8bbc314; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in bef30317fcb4c838a37bceb2fc76256eb6b975c1; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in 112c6ff29a56f3a22db4d5af869697aa07035ad6; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in 2666cddf0dd218aa9bd1f99db688d1b532eac21a; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in fc0c02f510e41650df3479f96e257acf87d8a20a; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in dc0be7662b7b0ce28cb5eea864737793ed7b9e70; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in c77cf8edae2bd3a1599115301cc7c98d0c78e731; From 7a73ba7469cbea631050094fd14f73acebb97cf9 · fixed in 85891d174707d8bddcec7a888fb4e1d17def34f3

  • Linux Linux

    2.6.33

  • KernelLinux

    From 2.6.33 · fixed in 5.10.265; From 5.11.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.151; From 6.7.0 · fixed in 6.12.103; From 6.13.0 · fixed in 6.18.44; From 6.19.0 · fixed in 7.1.8

References 8

git.kernel.org