Description (CNA)
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".
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 before 0016d5d46d7440729a3132f61a8da3bf7f84e2ba; affected 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 before e34b9ed96ce3b06c79bf884009b16961ca478f87 |
| Linux / Linux | affected 4.10; unaffected 0 before 4.10; unaffected 5.18.13 through 5.18.*; unaffected 5.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0016d5d46d7440729a3132f61a8da3bf7f84e2ba
- https://git.kernel.org/stable/c/e34b9ed96ce3b06c79bf884009b16961ca478f87
ADP enrichment
No English description supplied.
No references supplied.