CVE-2025-21757

[REJECTED CVE] 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.

This CVE has been rejected upstream: https://lore.kernel.org/linux-cve-announce/2025032455-REJECTED-9f08@gregkh/

No Red Hat products are affected by this vulnerability.