CVE-2026-43382
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.
Does this matter?
Lower severity and a low EPSS score (0.10%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.10% probability · 1th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/192f40ad8a7dac58dae9199a065dbf7e6e67b75bPatch
- https://git.kernel.org/stable/c/2ab9f2531d37775cd79228c1f5d80e6bd08d11d3Patch
- https://git.kernel.org/stable/c/4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9bPatch
- https://git.kernel.org/stable/c/77808fe7d03ad0062840b95f431869a8b3d88b24Patch
- https://git.kernel.org/stable/c/b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77Patch
- https://git.kernel.org/stable/c/cfc83a3c71517b59c1047db57da31e26a9dc2f33Patch
- https://git.kernel.org/stable/c/f3ca45673dab0514a887231de6f3243a699d5bfdPatch
- https://git.kernel.org/stable/c/fa7b4edfbabdf9235b0ab4bea297fc12b3bec9caPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.