linux: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: avoid skb access on nf_sto...
CVE-2022-49622 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49622, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: avoid skb access on nf_stolen When verdict is NF_STOLEN, the skb might have been freed. When tracing is enabled, this can result in a use-after-free: 1. access to skb->nf_trace 2. access to skb->mark 3. computation of trace id 4. dump of packet payload To avoid 1, keep a cached copy of skb->nf_trace in the trace state struct. Refresh this copy whenever verdict is != STOLEN. Avoid 2 by skipping skb->mark access if verdict is STOLEN. 3 is avoided by precomputing the trace id. Only dump the packet when verdict is not "STOLEN".
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.18.14-1 | DEBIAN-CVE-2022-49622 | Feb 26, 2025 |
| linux · Debian 13.5 (trixie) | 5.18.14-1 | DEBIAN-CVE-2022-49622 | Feb 26, 2025 |
| linux · Debian 14 | 5.18.14-1 | DEBIAN-CVE-2022-49622 | Feb 26, 2025 |
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