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CVE-2026-80958

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: dm-pcache: clamp the tail kset read to the segment data region The tail-kset read in cache_replay(), the writeback worker and t…

Published Sep 11, 2026EPSS 0.16%

Overview

CVE-2026-80958 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, 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:

dm-pcache: clamp the tail kset read to the segment data region

The tail-kset read in cache_replay(), the writeback worker and the GC

worker bounds its length by PCACHE_SEG_SIZE - seg_off, the raw segment

size rather than the data region. A tail near the segment end reads past

the segment data into the following control area.

Clamp the read to cache_seg_remain(), the data region.

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/1ab55354368d071ebaee4d8c82313955eab65a04Refgit.kernel.org/stable/c/2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500cRefgit.kernel.org/stable/c/becf07e2b0053027495ecd671b1f82fb2e615f68

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80958?

CVE-2026-80958 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-80958?

This vulnerability has a CVSS 3.1 base score of 7.1, 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-2026-80958?

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-2026-80958?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80958 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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