CVE-2022-49622
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49622
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49622.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49622
- Downstream
- Published
- 2025-02-26T07:01:37Z
- Modified
- 2025-08-09T19:01:26Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftables: avoid skb access on nfstolen
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".
- References