CVE-2022-49622High· 7.8▾ TwilightIn 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-…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 3.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
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:
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".
Linux >= 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 < 348218a4601e93de4d1e9fab29837cf656e4bf99Linux >= 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 < 453a67af8bd77463b33cb0336dd7f2341e332d29Linux >= 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 < 0016d5d46d7440729a3132f61a8da3bf7f84e2baLinux >= 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02 < e34b9ed96ce3b06c79bf884009b16961ca478f87Linux 4.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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