Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_ct: fix ref leak when switching zones
When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it.
The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached().
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 0fc1847359964e95e521cf2bb2b10f8e33dd0970, < 9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8; >= a95ea90deb3071c1ded77a05e91cfebc5238d908, < bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d; >= e9408de00e5ecd0dbe91cf061c7da23711c4febb, < 4bb42d73def9411e5cad885b9811987d72431df1; >= 2f131de361f6d0eaff17db26efdb844c178432f8, < b24793a37d91aacad7cb9893b226a7924a89636a; >= 2f131de361f6d0eaff17db26efdb844c178432f8, < bcb74e132a76ce0502bb33d5b65533a4ed72d159; >= 5.10.103, < 5.10.258; >= 5.15.26, < 5.15.33; >= 5.16.12, < 5.16.19 |
| Linux | Linux | 5.17 |
References
- https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1Patch
- https://git.kernel.org/stable/c/9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8
- https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636aPatch
- https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159Patch
- https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33dPatch
Timeline
- Published
- Feb 26, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Modified