CVE-2026-72234

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

State: Published
Severity: 9.8 Critical
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c018ad3de61a1dc4194879a53e5559e094aa7b1a to before aa9558af859934f24717d4bab97d61004f91a736Affected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 9c2c05629e46c1fd43931506d41c56a885a98eb4Affected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 7b162b36de750565404cd3b98315706622c6974fAffected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before ed90eb5c68420cdfe67ec1f773324198d2ef6f50Affected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 979175834a699ccc3c4c0b0ba60ecae0f135a587Affected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before b8afcf799b2cc92c41beebd029e53ed18960184aAffected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 9a7b7248798123efbd5fafe58461d57c7cc718afAffected c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 7141990add3f75436f2933cb310654cad3b1e3e9Affected
LinuxLinux	3.13Affected before 3.13Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

c018ad3de61a1dc4194879a53e5559e094aa7b1a to before aa9558af859934f24717d4bab97d61004f91a736Affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 9c2c05629e46c1fd43931506d41c56a885a98eb4Affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 7b162b36de750565404cd3b98315706622c6974fAffected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before ed90eb5c68420cdfe67ec1f773324198d2ef6f50Affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 979175834a699ccc3c4c0b0ba60ecae0f135a587Affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before b8afcf799b2cc92c41beebd029e53ed18960184aAffected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 9a7b7248798123efbd5fafe58461d57c7cc718afAffected
c018ad3de61a1dc4194879a53e5559e094aa7b1a to before 7141990add3f75436f2933cb310654cad3b1e3e9Affected

LinuxLinux

3.13Affected
before 3.13Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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