CVE-2022-49561netfilter: conntrack: re-fetch conntrack after insertion
- 9.8CriticalCVSS base score
- 0.82%Exploitation in 30 daysEPSS · top 42% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.82% · top 42% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < e97222b785e70e8973281666d709baad6523d8af
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < 92a999d1963eed0df666284e20055136ceabd12f
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < b16bb373988da3ceb0308381634117e18b6ec60d
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < 91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < 01989d7eebb61c99bd4b88ebc8e261bd2f02caed
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < 04f9e9104c969d8ce10a4a43634f641ed082092d
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < 04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
- affected 71d8c47fc653711c41bc3282e5b0e605b3727956 – < 56b14ecec97f39118bf85c9ac2438c5a949509ed
- affected 4.7
- unaffected < 4.7
- unaffected 4.14.282 – ≤ 4.14.*
- unaffected 4.19.246 – ≤ 4.19.*
- unaffected 5.4.197 – ≤ 5.4.*
- unaffected 5.10.120 – ≤ 5.10.*
- unaffected 5.15.45 – ≤ 5.15.*
- unaffected 5.17.13 – ≤ 5.17.*
- unaffected 5.18.2 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References
References8
- https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af (opens in a new tab)
- https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f (opens in a new tab)
- https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d (opens in a new tab)
- https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 (opens in a new tab)
- https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed (opens in a new tab)
- https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d (opens in a new tab)
- https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 (opens in a new tab)
- https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed (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)
- EUVD EUVD-2022-54671 (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://cveledger.app/cve/CVE-2022-49561)Record last updated .