CVE-2026-80887: Linux kernel · drm/vmwgfx: use check_add_overflow for shader size+offset bound
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
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.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80887 (opens in a new tab)
- git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3 (opens in a new tab)
- git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22 (opens in a new tab)
- git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21 (opens in a new tab)
- git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189 (opens in a new tab)
- git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9 (opens in a new tab)