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CVE-2026-97524

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid unneeded actions on subflow reset Once in a blue moon, the mptcp receive path can recursively call mptcp_data_read…

Published Sep 25, 2026EPSS 0.74%

Overview

CVE-2026-97524 is a high-severity vulnerability. It was published on September 25, 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: avoid unneeded actions on subflow reset

Once in a blue moon, the mptcp receive path can recursively call

mptcp_data_ready() via state change under unlucky error conditions, and

then try to hold the data lock again.

Break the recursion loop explicitly checking for the exceptional

condition.

Add a new flag instead of using an existing one like 'closing', to exit

early in subflow_state_change(), and explicitly flush the RX queue at

reset time.

This avoids unneeded processing to check for available data -- calling

get_mapping_status() and more on a dying subflow -- but also in error

reporting and worker scheduling.

Note that we must consume the currently peeked skb before invoking

mptcp_dss_corruption to avoid consuming it again after the eventual

reset has freed it.

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/1962841387087970d75ba8b8d4c2aa2d45705e50Refgit.kernel.org/stable/c/2b0f561f21b27c40c91ea4975268a06092bd7e9cRefgit.kernel.org/stable/c/4b7abdcb5ba832fafab679f0d998af39cbc99307Refgit.kernel.org/stable/c/6d669c740933124eae3df8cfc15995af9bcc6abaRefgit.kernel.org/stable/c/83a7dcdd2b1060484528da70a643125174d47e5aRefgit.kernel.org/stable/c/a370e56024df0b07e3120c45a9773ae123819fd6Refgit.kernel.org/stable/c/b2dbcc1ed48b5ac070a41db4a52aade6823c4df0Refgit.kernel.org/stable/c/ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-97524?

CVE-2026-97524 is a high-severity vulnerability. It was published on September 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-97524?

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-2026-97524?

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-2026-97524?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-97524 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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