{"id":"CVE-2026-74444","title":"drm/vmwgfx: validate DRAW_PRIMITIVES header size before division","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: validate DRAW_PRIMITIVES header size before division\n\nvmw_cmd_draw() computes\n\n\tmaxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);\n\nwhere header->…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < b89ca4bba820f79dde52af15ee139fe6e8bbc314","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < bef30317fcb4c838a37bceb2fc76256eb6b975c1","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < 112c6ff29a56f3a22db4d5af869697aa07035ad6","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < 2666cddf0dd218aa9bd1f99db688d1b532eac21a","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < fc0c02f510e41650df3479f96e257acf87d8a20a","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < dc0be7662b7b0ce28cb5eea864737793ed7b9e70","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < c77cf8edae2bd3a1599115301cc7c98d0c78e731","Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < 85891d174707d8bddcec7a888fb4e1d17def34f3","Linux 2.6.33"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:56:36.182833Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:45.890Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74444","references":[{"url":"https://git.kernel.org/stable/c/b89ca4bba820f79dde52af15ee139fe6e8bbc314"},{"url":"https://git.kernel.org/stable/c/bef30317fcb4c838a37bceb2fc76256eb6b975c1"},{"url":"https://git.kernel.org/stable/c/112c6ff29a56f3a22db4d5af869697aa07035ad6"},{"url":"https://git.kernel.org/stable/c/2666cddf0dd218aa9bd1f99db688d1b532eac21a"},{"url":"https://git.kernel.org/stable/c/fc0c02f510e41650df3479f96e257acf87d8a20a"},{"url":"https://git.kernel.org/stable/c/dc0be7662b7b0ce28cb5eea864737793ed7b9e70"},{"url":"https://git.kernel.org/stable/c/c77cf8edae2bd3a1599115301cc7c98d0c78e731"},{"url":"https://git.kernel.org/stable/c/85891d174707d8bddcec7a888fb4e1d17def34f3"}],"tags":["cve.org"],"epss":0.00129,"epssPercentile":0.02273,"ingestedAt":"2026-10-16T19:46:24.363Z","slug":"CVE-2026-74444","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: validate DRAW_PRIMITIVES header size before division\n\nvmw_cmd_draw() computes\n\n\tmaxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);\n\nwhere header->size is u32 and is taken straight from the user-supplied\ncommand stream.  When header->size is less than sizeof(cmd->body) the\nunsigned subtraction wraps to nearly 4 GiB, producing a huge maxnum.\nAny user-controlled cmd->body.numVertexDecls then passes the bound and\nthe loop dereferences decl[i] far past the end of the kernel command\nbounce buffer, producing an out-of-bounds read of kernel memory.\n\nReject undersized headers up front.\n\n## Affected\n\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < b89ca4bba820f79dde52af15ee139fe6e8bbc314`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < bef30317fcb4c838a37bceb2fc76256eb6b975c1`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < 112c6ff29a56f3a22db4d5af869697aa07035ad6`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < 2666cddf0dd218aa9bd1f99db688d1b532eac21a`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < fc0c02f510e41650df3479f96e257acf87d8a20a`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < dc0be7662b7b0ce28cb5eea864737793ed7b9e70`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < c77cf8edae2bd3a1599115301cc7c98d0c78e731`\n- `Linux >= 7a73ba7469cbea631050094fd14f73acebb97cf9 < 85891d174707d8bddcec7a888fb4e1d17def34f3`\n- `Linux 2.6.33`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}