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CVE-2026-80576

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: reject oversized IBs with per-ring packet limits On GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes thro…

Published Aug 26, 2026EPSS 0.12%

Overview

CVE-2026-80576 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: reject oversized IBs with per-ring packet limits

On GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through

to ib->length_dw without a limit, while ring_emit_ib() encodes length

into packet fields. Oversized values can corrupt adjacent control bits

and destabilize command submission.

Add a per-ring IB packet size limit helper and reject command

submissions exceeding the corresponding dword limit before IB

allocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE,

and apply the MM fallback limit for other ring types.

(cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/07fe270ec07c138a70afe7a81e115a85c35c545cRefgit.kernel.org/stable/c/1474f3970d1afd303e12ff14d06808eabb371576Refgit.kernel.org/stable/c/6e164ba1057175fb8a370d8e05cbff5c57eac0c8Refgit.kernel.org/stable/c/fd37f9dd5b5ab70a46fa7bc76623c0528d602b27

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80576?

CVE-2026-80576 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-80576?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-80576?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-80576?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80576 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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