CVE-2024-41043

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nfnetlink_queue: drop bogus WARN_ON

Happens when rules get flushed/deleted while packet is out, so remove this WARN_ON.

This WARN exists in one form or another since v4.14, no need to backport this to older releases, hence use a more recent fixes tag.

Weakness

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Affected Software

Extended Description

While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.

Potential Mitigations

References

• https://git.kernel.org/stable/c/631a4b3ddc7831b20442c59c28b0476d0704c9af
• https://git.kernel.org/stable/c/86858da8335db48bde9be02abd7156a69d622e86
• https://git.kernel.org/stable/c/631a4b3ddc7831b20442c59c28b0476d0704c9af
• https://git.kernel.org/stable/c/86858da8335db48bde9be02abd7156a69d622e86