CVE-2024-50251 netfilter: nft_payload: sanitize offset and length before calling skb_checksum()

What is CVE-2024-50251?

CVE-2024-50251 is a medium-severity denial of service vulnerability in Linux kernel, published on 9 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

netfilter: nft_payload: sanitize offset and length before calling skb_checksum()

If access to offset + length is larger than the skbuff length, then skb_checksum() triggers BUG_ON().

skb_checksum() internally subtracts the length parameter while iterating over skbuff, BUG_ON(len) at the end of it checks that the expected length to be included in the checksum calculation is fully consumed.

Which versions are affected by CVE-2024-50251?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50251?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-50251 being exploited?

There is no known exploitation of CVE-2024-50251 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-53277, AZL-53328, BELL-CVE-2024-50251, DEBIAN-CVE-2024-50251, GHSA-gmgf-ff9x-r369, UBUNTU-CVE-2024-50251.