Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: fix guest_memory_dirty bitfield clobbered as size Two sites in vmwgfx_resource.c assign boolean literals to res->guest_memory_size, which is an unsigned long allocation-size field; the intended target is the adjacent res->guest_memory_dirty bitfield. After the assignments the field holds 0 or 1 instead of the resource's MOB allocation size: - vmw_resource_release() writes 0 (false), and - vmw_resource_unbind_list() writes 1 (true). Subsequent revalidation paths read guest_memory_size when computing the dirty page range (vmw_bo_dirty_transfer_to_res()) and the buffer allocation size (vmw_resource_buf_alloc()), producing zero-length walks or wrap-around ranges that read or write past the MOB bitmap. The dirty-tracking intent of the original code (mark the resource as dirtied since the last sync) is also lost, since guest_memory_dirty is never updated. Rename both assignments to guest_memory_dirty.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 668b206601c5f5063e03b76784a0d3024fa2b249 before 21bbe38faee4a195d33a93e3908e307807f7745d; affected 668b206601c5f5063e03b76784a0d3024fa2b249 before 9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6; affected 668b206601c5f5063e03b76784a0d3024fa2b249 before 282f261cb035e5f01a486f76d356b7e9dbfba73f; affected 668b206601c5f5063e03b76784a0d3024fa2b249 before 3b2bb16a5b622867140d69925db411ac8ecb3b2b; affected 668b206601c5f5063e03b76784a0d3024fa2b249 before 83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa |
| Linux / Linux | affected 6.4; unaffected 0 before 6.4; 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/21bbe38faee4a195d33a93e3908e307807f7745d
- https://git.kernel.org/stable/c/9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6
- https://git.kernel.org/stable/c/282f261cb035e5f01a486f76d356b7e9dbfba73f
- https://git.kernel.org/stable/c/3b2bb16a5b622867140d69925db411ac8ecb3b2b
- https://git.kernel.org/stable/c/83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa
ADP enrichment
No English description supplied.
No references supplied.