CVE-2025-21768None▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 21.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
0.2% → 0.3%
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.
Linux >= 6c8702c60b88651072460f3f4026c7dfe2521d12 < e2ef3fa31353b30bda94358fe5205c141289746dLinux >= 6c8702c60b88651072460f3f4026c7dfe2521d12 < 5ab11a4e219e93b8b31a27f8ec98d42afadd8b7aLinux >= 6c8702c60b88651072460f3f4026c7dfe2521d12 < 4c0f200c7d06fedddde82209c099014d63f4a6c0Linux >= 6c8702c60b88651072460f3f4026c7dfe2521d12 < 92191dd1073088753821b862b791dcc83e558e07Linux 4.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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