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CVE-2026-80588

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mptcp: reclaim forward-allocated memory on RX path errors After commit 9db5b3cec4ec ("mptcp: borrow forward memory from subflow…

Published Aug 26, 2026EPSS 0.61%

Overview

CVE-2026-80588 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

mptcp: reclaim forward-allocated memory on RX path errors

After commit 9db5b3cec4ec ("mptcp: borrow forward memory from subflow"),

errors in the receive path prior to queueing skbs into the receive

queue do not trigger forward-allocated memory reclaiming.

Prevent forward memory from growing unboundedly in pathological drop

scenarios by explicitly reclaiming memory when skbs are dropped.

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/41b49a8b914ec7dcb03eae93fb27f3c464078644Refgit.kernel.org/stable/c/473f1a5ab2abc98dd9e74b95b9c23c66c47535ccRefgit.kernel.org/stable/c/8277f48a06d3aa1441f6d0b6998ccc0360d30ed8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80588?

CVE-2026-80588 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-80588?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80588?

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-2026-80588?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80588 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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