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.
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