CVE-2022-49561
Linux Kernel vulnerability
- Published26 Feb 2025
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed
- https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
- https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d
- https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed
- https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
- https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f
References
- https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed
- https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
- https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d
- https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed
- https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
- https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f
- https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d
- https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af
Frequently asked
Is CVE-2022-49561 being actively exploited?
CVE-2022-49561 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.82%.
How severe is CVE-2022-49561?
CVE-2022-49561 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.82% probability of exploitation.
Which products are affected by CVE-2022-49561?
Affected products include Linux Kernel.
How do I fix CVE-2022-49561?
Upgrade affected software to a fixed version, for example Linux Kernel 4.19.246 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2022-49561 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.