CVE-2025-21768
net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Feb 27, 2025 |
| Last Updated | May 11, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
6c8702c60b88651072460f3f4026c7dfe2521d12 < 5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a 6c8702c60b88651072460f3f4026c7dfe2521d12 < 4c0f200c7d06fedddde82209c099014d63f4a6c0 6c8702c60b88651072460f3f4026c7dfe2521d12 < 92191dd1073088753821b862b791dcc83e558e07
Linux / Linux
4.10