Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-52919

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix tp_meter counter underflow during shutdown batadv_tp_sender_shutdown() unconditionally decrements the "sending"…

Published Jun 24, 2026CWE-191EPSS 0.12%

Overview

CVE-2026-52919 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

batman-adv: fix tp_meter counter underflow during shutdown

batadv_tp_sender_shutdown() unconditionally decrements the "sending"

atomic counter. If multiple paths (e.g. timeout, user cancel, and

normal finish) call this function, the counter can underflow to -1.

Since the sender logic treats any non-zero value as "still sending",

a negative value causes the sender kthread to loop indefinitely.

This leads to a use-after-free when the interface is removed while

the zombie thread is still active.

Fix this by using atomic_xchg() to ensure the counter only transitions

from 1 to 0 once.

[sven: added missing change in batadv_tp_send]

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/01cefc5923889e29dbb5f281c3d457714ceb9c00Refgit.kernel.org/stable/c/90ae3eae06b7b8ab9f6250b9497c860915b4c17bRefgit.kernel.org/stable/c/94f3b133168d1c49895e7cc6afbcf1cc0b354602Refgit.kernel.org/stable/c/abae88fa254f2981d39ac003a7b302528a22af64Refgit.kernel.org/stable/c/aeae11c5dad9cd0d50723890bdd866f8e6db2e7dRefgit.kernel.org/stable/c/c1bac194733aabd731aafa6a01350c229e187dbaRefgit.kernel.org/stable/c/c66d20a3ff095e3f000551d208ec2606616db15cRefgit.kernel.org/stable/c/e75e2ab463b5b34df6b98f94d740aff327ce9f6b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52919?

CVE-2026-52919 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-52919?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2026-52919?

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-2026-52919?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52919 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.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999