CVE-2024-26808 netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain

What is CVE-2024-26808?

CVE-2024-26808 is a high-severity use after free vulnerability in Debian Debian Linux, published on 4 Apr 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_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain

Remove netdevice from inet/ingress basechain in case NETDEV_UNREGISTER event is reported, otherwise a stale reference to netdevice remains in the hook list.

Which versions are affected by CVE-2024-26808?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2024-26808?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2024-26808 being exploited?

There is no known exploitation of CVE-2024-26808 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as BELL-CVE-2024-26808, DEBIAN-CVE-2024-26808, GHSA-9rp8-67w7-gf47, UBUNTU-CVE-2024-26808.