Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6_output() Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF. We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().
References5
- git.kernel.org/stable/c/0393f85c3241c19ba8550f04a812e7d19f6b3082
- git.kernel.org/stable/c/11709573cc4e48dc34c80fc7ab9ce5b159e29695
- git.kernel.org/stable/c/423895685f367b5a0a956bd14b02df0192bded4c
- git.kernel.org/stable/c/4549ce1057363c8dc072f40c6aa591c279eafed2
- git.kernel.org/stable/c/92803b826e40e49a5e8a6e208f4b4574e9d19426
Metrics
- CVSS 3.1
-
8.1
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 47 · as of 10 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.