CVE-2026-43382

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa0019971f340ae02ba54cf1861f72da7e03e6b66 < 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9baffected
LinuxLinux3c0e0aecb78cb2a2ca1dc701982d08fedb088dc6 < 192f40ad8a7dac58dae9199a065dbf7e6e67b75baffected
LinuxLinux781a06fd265a8151f7601122d9c2e985663828ff < fa7b4edfbabdf9235b0ab4bea297fc12b3bec9caaffected
LinuxLinuxa7aa2317285806640c844acd4cd2cd768e395264 < f3ca45673dab0514a887231de6f3243a699d5bfdaffected
LinuxLinux0fdc3c166ac17b26014313fa2b93696354511b24 < b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77affected
LinuxLinux8c8ecc98f5c65947b0070a24bac11e12e47cc65d < 2ab9f2531d37775cd79228c1f5d80e6bd08d11d3affected
LinuxLinux8c8ecc98f5c65947b0070a24bac11e12e47cc65d < 77808fe7d03ad0062840b95f431869a8b3d88b24affected
LinuxLinux8c8ecc98f5c65947b0070a24bac11e12e47cc65d < cfc83a3c71517b59c1047db57da31e26a9dc2f33affected
LinuxLinux1c334629176c2d644befc31a20d4bf75542f7631affected
LinuxLinuxaf264c2a9adc37f4bdf88ca7f3affa15d8c7de9eaffected
LinuxLinux5.10.235 < 5.10.253affected
LinuxLinux5.15.179 < 5.15.203affected
LinuxLinux6.1.129 < 6.1.167affected
LinuxLinux6.6.79 < 6.6.130affected
LinuxLinux6.12.16 < 6.12.78affected
LinuxLinux5.4.291 < 5.5affected
LinuxLinux6.13.4 < 6.14affected
LinuxLinux6.14affected
LinuxLinux0 < 6.14unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.78 <= 6.12.*unaffected
LinuxLinux6.18.19 <= 6.18.*unaffected
LinuxLinux6.19.9 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References