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.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

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Fixes

Solution

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Workaround

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References
Link Providers
https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3 cve-icon cve-icon
https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22 cve-icon cve-icon
https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21 cve-icon cve-icon
https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189 cve-icon cve-icon
https://git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9 cve-icon cve-icon
History

Fri, 04 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-190
CWE-787

Fri, 04 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description 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.
Title drm/vmwgfx: use check_add_overflow for shader size+offset bound
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-04T17:11:04.063Z

Reserved: 2026-08-26T14:34:25.799Z

Link: CVE-2026-80887

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-04T18:17:56.667

Modified: 2026-09-04T18:17:56.667

Link: CVE-2026-80887

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-04T21:15:05Z

Weaknesses