medium5.5
CVE-2025-21768
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels Some lwtunnels have a dst cac…
Impact
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels Some lwtunnels have a dst cache for post-transformation dst. If the packet destination did not change we may end up recording a reference to the lwtunnel in its own cache, and the lwtunnel state will never be freed. Discovered by the ioam6.sh test, kmemleak was recently fixed to catch per-cpu memory leaks. I'm not sure if rpl and seg6 can actually hit this, but in principle I don't see why not.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 4.10 before 6.12.16 from 6.13 before 6.13.4 Version 6.14 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/26f0b472ae2a82920e38c7cf41583951046d586a
- https://git.kernel.org/stable/c/4c0f200c7d06fedddde82209c099014d63f4a6c0
- https://git.kernel.org/stable/c/5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a
- https://git.kernel.org/stable/c/92191dd1073088753821b862b791dcc83e558e07
- https://git.kernel.org/stable/c/e2ef3fa31353b30bda94358fe5205c141289746d