CVE-2025-21768
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21768
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21768.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21768
- Downstream
- Related
- Published
- 2025-02-27T03:15:17Z
- Modified
- 2025-08-09T20:01:28Z
- Summary
- [none]
- Details
-
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.
- References