What’s Vulnerable › Vulnerabilities

CVE-2026-52926: batman-adv: clear current gateway during teardown

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-07-08

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.

Affected products

• Linux kernel: from 3.1 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34 — fixed in 5.10.258, 5.15.209, 6.1.175, 6.12.92, 6.18.34, 6.6.142

How to fix

Upgrade to a fixed version: Linux kernel 5.10.258, 5.15.209, 6.1.175, 6.12.92. Check the vendor advisory for mitigations.

References

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

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