CVE-2025-21768
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6c8702c60b88651072460f3f4026c7dfe2521d12 | affected | git | e2ef3fa31353b30bda94358fe5205c141289746d | Unavailable | None listed |
| 6c8702c60b88651072460f3f4026c7dfe2521d12 | affected | git | 5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a | Unavailable | None listed |
| 6c8702c60b88651072460f3f4026c7dfe2521d12 | affected | git | 4c0f200c7d06fedddde82209c099014d63f4a6c0 | Unavailable | None listed |
| 6c8702c60b88651072460f3f4026c7dfe2521d12 | affected | git | 92191dd1073088753821b862b791dcc83e558e07 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.10 | Unavailable | None listed |
| 6.6.160 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.16 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.4 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |