Vulnerability details
CVE-2022-49622
Linux Linux
netfilter: nf_tables: avoid skb access on nf_stolen
CVSS 3.1
7.8High
Official description
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".
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 4.10 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 ≤ v < 348218a4601e93de4d1e9fab29837cf656e4bf99 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 ≤ v < 453a67af8bd77463b33cb0336dd7f2341e332d29 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 ≤ v < 0016d5d46d7440729a3132f61a8da3bf7f84e2ba | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 ≤ v < e34b9ed96ce3b06c79bf884009b16961ca478f87 | CVEProject cvelistV5 (CNA) |
References and advisories
4
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Details
- Published
- 2025-02-26
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.27%
Probability of exploitation in 30 days
19.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free