CVE-2025-21757 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net: ipv6: fix dst refleaks in rpl seg6 and ioam6 lwtunnels

dst_cache_get() gives us a reference we need to release it.

Discovered by the ioam6.sh test kmemleak was recently fixed to catch per-cpu memory leaks.

Reference

https://git.kernel.org/stable/c/2248b8145053eb2ae35ca4cf694b885a086719bb https://git.kernel.org/stable/c/c71a192976ded2f2f416d03c4f595cdd4478b825 https://git.kernel.org/stable/c/d90f8f930c3053bb11f5def9aff5310a70429260