CVE-2026-80887 is a vulnerability in Linux Kernel
Published on September 4, 2026
drm/vmwgfx: use check_add_overflow for shader size+offset bound
In the Linux kernel, the following vulnerability has been resolved:
drm/vmwgfx: use check_add_overflow for shader size+offset bound
vmw_shader_define() validates the user-supplied shader window against
its backing buffer with
(u64)buffer->tbo.base.size < (u64)size + (u64)offset
drm_vmw_shader_create_arg::offset is __u64 in the uapi; when it is
near U64_MAX the unsigned addition wraps and the resulting tiny value
passes the check. The unbounded offset is then stored in
res->guest_memory_offset and forwarded to host SVGA shader-create
commands.
Use check_add_overflow() to detect the wrap and compare the resulting
endpoint against the buffer size.
Products Associated with CVE-2026-80887
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Affected Versions
Linux:- Version 668b206601c5f5063e03b76784a0d3024fa2b249 and below 1bbe7751f5ebac383405ef29a66622d65bd505d3 is affected.
- Version 668b206601c5f5063e03b76784a0d3024fa2b249 and below d3f44438aa805270aaead3b6840ccaea0f4c11f9 is affected.
- Version 668b206601c5f5063e03b76784a0d3024fa2b249 and below cfd163169af3be56eaef113c680ea251f0d09189 is affected.
- Version 668b206601c5f5063e03b76784a0d3024fa2b249 and below 5c725901908eb1e52a16fc0e2373cb761df42d21 is affected.
- Version 668b206601c5f5063e03b76784a0d3024fa2b249 and below 54d56d5b42d2e4c72ba6e365e9774da90698aa22 is affected.
- Version 6.4 is affected.
- Before 6.4 is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.