CVE-2022-49622
netfilter: nf_tables: avoid skb access on nf_stolen
- Published
- Updated
- Reserved
- Assigned by
- Linux
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".
Timeline
ID reserved
By Linux
Published
- 20 months later
· 20 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 80% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 – < 348218a4601e93de4d1e9fab29837cf656e4bf99
- affected 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 – < 453a67af8bd77463b33cb0336dd7f2341e332d29
- affected 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 – < 0016d5d46d7440729a3132f61a8da3bf7f84e2ba
- affected 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 – < e34b9ed96ce3b06c79bf884009b16961ca478f87
- affected 4.10
- unaffected < 4.10
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 5.18.13 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (4)
- https://git.kernel.org/stable/c/348218a4601e93de4d1e9fab29837cf656e4bf99 (opens in a new tab)
- https://git.kernel.org/stable/c/453a67af8bd77463b33cb0336dd7f2341e332d29 (opens in a new tab)
- https://git.kernel.org/stable/c/0016d5d46d7440729a3132f61a8da3bf7f84e2ba (opens in a new tab)
- https://git.kernel.org/stable/c/e34b9ed96ce3b06c79bf884009b16961ca478f87 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49622)Record last updated .