CVE-2022-49561
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Linux Kernel
PublishedFeb 26, 2025
First seenFeb 26, 2025
How to fix
Update
- linux linux_kernel4.14.282, 4.19.246, 5.4.197, 5.10.120, 5.15.45, 5.17.13, 5.18.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.7 ≤ v < 4.14.282, 4.15 ≤ v < 4.19.246, 4.20 ≤ v < 5.4.197, 5.5 ≤ v < 5.10.120, 5.11 ≤ v < 5.15.45, 5.16 ≤ v < 5.17.13, 5.18 ≤ v < 5.18.2 | 4.14.282, 4.19.246, 5.4.197, 5.10.120, 5.15.45, 5.17.13, 5.18.2 |
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