Improper Validation of Specified Index, Position, or Offset in Input The advisory has been revoked - it doesn't affect any version of package kernel-rt-debug-kvm (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-KERNELRTDEBUGKVM-20547624
- published7 Oct 2026
- disclosed4 Sept 2026
Introduced: 4 Sep 2026
CVE-2026-80887 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by RHEL.
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
- https://bugzilla.redhat.com/show_bug.cgi?id=2528788
- https://access.redhat.com/security/cve/CVE-2026-80887
- https://access.redhat.com/errata/RHSA-2026:88477
- https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3
- https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22
- https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21
- https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189
- https://git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9