What happened
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().
Affected versions
Linux: 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 through before e150f273cd8ed34ebc6d03758aad95c12fc58337 (git); 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 through before 684efb2c86c887685f9aa65e1a21b3df6c1f822d (git); 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 through before 923e0734c386984d45de508528a7a7ad91d791cc (git); 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 through before 6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8 (git); 4.13 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.