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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
668b206601c5f5063e03b76784a0d3024fa2b249 affected < 1bbe7751f5ebac383405ef29a66622d65bd505d3
668b206601c5f5063e03b76784a0d3024fa2b249 affected < d3f44438aa805270aaead3b6840ccaea0f4c11f9
668b206601c5f5063e03b76784a0d3024fa2b249 affected < cfd163169af3be56eaef113c680ea251f0d09189
668b206601c5f5063e03b76784a0d3024fa2b249 affected < 5c725901908eb1e52a16fc0e2373cb761df42d21
668b206601c5f5063e03b76784a0d3024fa2b249 affected < 54d56d5b42d2e4c72ba6e365e9774da90698aa22
Linux Linux affected
Version Status Constraints
6.4 affected —
0 unaffected < 6.4
6.6.151 unaffected ≤ 6.6.*
6.12.103 unaffected ≤ 6.12.*
6.18.44 unaffected ≤ 6.18.*
7.1.8 unaffected ≤ 7.1.*
7.2 unaffected ≤ *

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Fixes

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Workaround

No workaround given by the vendor.

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

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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