CVE-2022-49561 : faille critique Linux Linux (CVSS 9.8)

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.

Sévérité

Critique (CVSS 9.8)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

26 févr. 2025

Dernière mise à jour

5 août 2026

• Linux Linux

• Fiche CVE-2022-49561 sur le NVD (NIST)
• git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d…
• git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd…
• git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec…
• git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b602…
• git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02c…
• git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed0820…
• git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f…
• git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a94950…