CVE-2025-21768
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2025-02-27
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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.
Weakness Classification (1)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 6c8702c60b88651072460f3f4026c7dfe2521d12 < 26f0b472ae2a82920e38c7cf41583951046d586a |
| Linux | Linux | 6c8702c60b88651072460f3f4026c7dfe2521d12 < e2ef3fa31353b30bda94358fe5205c141289746d |
| Linux | Linux | 6c8702c60b88651072460f3f4026c7dfe2521d12 < 5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a |
| Linux | Linux | 6c8702c60b88651072460f3f4026c7dfe2521d12 < 4c0f200c7d06fedddde82209c099014d63f4a6c0 |
| Linux | Linux | 6c8702c60b88651072460f3f4026c7dfe2521d12 < 92191dd1073088753821b862b791dcc83e558e07 |
| Linux | Linux | 4.10 |
| linux | linux_kernel | 4.10 – 6.12.16 |
| linux | linux_kernel | 6.14 |