CVE-2022-49561

netfilter: conntrack: re-fetch conntrack after insertion

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.

N/A

CVSS

Severity:

EPSS 0.06%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af
https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f
https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d
https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed
https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d
https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed

Frequently Asked Questions

What is the severity of CVE-2022-49561?: CVE-2022-49561 has not yet been assigned a CVSS score.
How to fix CVE-2022-49561?: To fix CVE-2022-49561, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49561 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49561 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49561?: CVE-2022-49561 affects Linux Linux, Linux Linux.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.