batman-adv: bla: prevent use-after-free when deleting claims
At a glance
Severity
HIGH 8.8
EPSS
EPSS 0.27 % · percentile 20 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: bla: prevent use-after-free when deleting claims
When batadv_bla_del_backbone_claims() removes all claims for a backbone, it
does this by dropping the link entry in the hash list. This list entry
itself was one of the references which need to be dropped at the same time
via batadv_claim_put().
But the batadv_claim_put() must not be done before the last access to the
claim object in this function. Otherwise the claim might be freed already
by the batadv_claim_release() function before the list entry was dropped.
