CVE-2024-40993
Published: July 16, 2024Last modified: February 20, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Fix suspicious rcu_dereference_protected() When destroying all sets, we are either in pernet exit phase or are executing a "destroy all sets command" from userspace. The latter was taken into account in ip_set_dereference() (nfnetlink mutex is held), but the former was not. The patch adds the required check to rcu_dereference_protected() in ip_set_dereference().
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.97-r0) |
| 25 LTS | linux-lts | Not affected (6.6.89-r0) | |
| Stream | linux-lts | Not affected (6.1.33-r0) |
References
- https://git.kernel.org/stable/c/3799d02ae4208af08e81310770d8754863a246a1
- https://git.kernel.org/stable/c/3fc09e1ca854bc234e007a56e0f7431f5e2defb5
- https://git.kernel.org/stable/c/523bed6489e089dd8040e72453fb79da47b144c2
- https://git.kernel.org/stable/c/72d9611968867cc4c5509e7708b1507d692b797a
- https://git.kernel.org/stable/c/788d585e62f487bc4536d454937f737b70d39a33
- https://git.kernel.org/stable/c/8ecd06277a7664f4ef018abae3abd3451d64e7a6
- https://git.kernel.org/stable/c/94dd411c18d7fff9e411555d5c662d29416501e4
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html