CVE-2022-49561

low-risk
Published 2025-02-26

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.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (8)

Patch https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed
Patch https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
Patch https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d
Patch https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed
Patch https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
Patch https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f
Patch https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d
Patch https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal