What’s Vulnerable › Vulnerabilities

CVE-2026-72234: batman-adv: access unicast_ttvn skb->data only after skb realloc

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.

Affected products

• Linux kernel: 3.13 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9
• https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f
• https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587
• https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af
• https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4
• https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736
• https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a
• https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50

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