Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: clear current gateway during teardown batadv_gw_node_free() removes the gateway list entries during mesh teardown, but it does not clear the currently selected gateway. This leaves stale gateway state behind across cleanup and can break a later mesh recreation. Clear bat_priv->gw.curr_gw before walking the gateway list so the selected gateway reference is dropped as part of teardown.

References 8

• git.kernel.org https://git.kernel.org/stable/c/17e3a441111cd1a530cd6ee69a22f3161d80d810
• git.kernel.org https://git.kernel.org/stable/c/30bda3ef4b0cac777f1a7c314cd08b8ff6437365
• git.kernel.org https://git.kernel.org/stable/c/6de089b545db013433cf934bb4e4433dec2dd65f
• git.kernel.org https://git.kernel.org/stable/c/9a1a8ed4facfe843bde6fdfcf7af0e9923eb2e17
• git.kernel.org https://git.kernel.org/stable/c/a340a51ed801eab7bb454150c226323b865263cc
• git.kernel.org https://git.kernel.org/stable/c/a3f3f1ec8aad84c5dd386c430b9c61cddd85b18f
• git.kernel.org https://git.kernel.org/stable/c/ae7aeb0ce3c0ebbe357ed525779acac197a18086
• git.kernel.org https://git.kernel.org/stable/c/e2ec4c712d19141ca7bf7fbbb1d842f73abaa186

Remediation