Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before b89ca4bba820f79dde52af15ee139fe6e8bbc314; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before bef30317fcb4c838a37bceb2fc76256eb6b975c1; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before 112c6ff29a56f3a22db4d5af869697aa07035ad6; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before 2666cddf0dd218aa9bd1f99db688d1b532eac21a; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before fc0c02f510e41650df3479f96e257acf87d8a20a; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before dc0be7662b7b0ce28cb5eea864737793ed7b9e70; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before c77cf8edae2bd3a1599115301cc7c98d0c78e731; affected 7a73ba7469cbea631050094fd14f73acebb97cf9 before 85891d174707d8bddcec7a888fb4e1d17def34f3 |
| Linux / Linux | affected 2.6.33; unaffected 0 before 2.6.33; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b89ca4bba820f79dde52af15ee139fe6e8bbc314
- https://git.kernel.org/stable/c/bef30317fcb4c838a37bceb2fc76256eb6b975c1
- https://git.kernel.org/stable/c/112c6ff29a56f3a22db4d5af869697aa07035ad6
- https://git.kernel.org/stable/c/2666cddf0dd218aa9bd1f99db688d1b532eac21a
- https://git.kernel.org/stable/c/fc0c02f510e41650df3479f96e257acf87d8a20a
- https://git.kernel.org/stable/c/dc0be7662b7b0ce28cb5eea864737793ed7b9e70
- https://git.kernel.org/stable/c/c77cf8edae2bd3a1599115301cc7c98d0c78e731
- https://git.kernel.org/stable/c/85891d174707d8bddcec7a888fb4e1d17def34f3
ADP enrichment
No English description supplied.
No references supplied.