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CVE-2026-43382

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: batman-adv: Avoid double-rtnl_lock ELP metric worker batadv_v_elp_get_throughput() might be called when the RTNL lock is alread…

Published May 8, 2026CWE-667EPSS 0.13%

Overview

CVE-2026-43382 is a medium-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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: Avoid double-rtnl_lock ELP metric worker

batadv_v_elp_get_throughput() might be called when the RTNL lock is already

held. This could be problematic when the work queue item is cancelled via

cancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case,

an rtnl_lock() would cause a deadlock.

To avoid this, rtnl_trylock() was used in this function to skip the

retrieval of the ethtool information in case the RTNL lock was already

held.

But for cfg80211 interfaces, batadv_get_real_netdev() was called - which

also uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must

also be used instead and the lockless version __batadv_get_real_netdev()

has to be called.

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/192f40ad8a7dac58dae9199a065dbf7e6e67b75bRefgit.kernel.org/stable/c/2ab9f2531d37775cd79228c1f5d80e6bd08d11d3Refgit.kernel.org/stable/c/4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9bRefgit.kernel.org/stable/c/77808fe7d03ad0062840b95f431869a8b3d88b24Refgit.kernel.org/stable/c/b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77Refgit.kernel.org/stable/c/cfc83a3c71517b59c1047db57da31e26a9dc2f33Refgit.kernel.org/stable/c/f3ca45673dab0514a887231de6f3243a699d5bfdRefgit.kernel.org/stable/c/fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43382?

CVE-2026-43382 is a medium-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43382?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43382?

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-2026-43382?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43382 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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