CVE-2022-49622
- Source
- https://cve.org/CVERecord?id=CVE-2022-49622
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49622.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49622
- Downstream
- Related
- Published
- 2025-02-26T02:23:39.341Z
- Modified
- 2026-03-20T12:24:42.024083Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- netfilter: nf_tables: avoid skb access on nf_stolen
- 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".
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49622.json" }- References
-
- https://git.kernel.org/stable/c/0016d5d46d7440729a3132f61a8da3bf7f84e2ba
- https://git.kernel.org/stable/c/e34b9ed96ce3b06c79bf884009b16961ca478f87
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49622.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49622
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git