Description
In the Linux kernel, the following vulnerability has been resolved: ipv4: start using dst_dev_rcu() Change icmpv4_xrlim_allow(), ip_defrag() to prevent possible UAF. Change ipmr_prepare_xmit(), ipmr_queue_fwd_xmit(), ip_mr_output(), ipv4_neigh_lookup() to use lockdep enabled dst_dev_rcu().
References5
- git.kernel.org/stable/c/684efb2c86c887685f9aa65e1a21b3df6c1f822d
- git.kernel.org/stable/c/6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8
- git.kernel.org/stable/c/864155c164654110f68a17a63bd0339754790d67
- git.kernel.org/stable/c/923e0734c386984d45de508528a7a7ad91d791cc
- git.kernel.org/stable/c/e150f273cd8ed34ebc6d03758aad95c12fc58337
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 40 · 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.