CVE-2024-26925 netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path
A race condition in the Linux kernel netfilter subsystem allows an async GC worker to access released locks, potentially causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-26925?
CVE-2024-26925 is a high-severity vulnerability in Debian Debian Linux, published on 24 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: nf_tables: release mutex after nft_gc_seq_end from abort path
The commit mutex should not be released during the critical section between nft_gc_seq_begin() and nft_gc_seq_end(), otherwise, async GC worker could collect expired objects and get the released commit lock within the same GC sequence.
nf_tables_module_autoload() temporarily releases the mutex to load module dependencies, then it goes back to replay the transaction again. Move it at the end of the abort phase after nft_gc_seq_end() is called.
Weakness: CWE-667
Which versions are affected by CVE-2024-26925?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2024-26925?
Apply the vendor's patch.
Is CVE-2024-26925 being exploited?
There is no known exploitation of CVE-2024-26925 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2024-26925, DEBIAN-CVE-2024-26925, GHSA-77mf-44mv-3m36, UBUNTU-CVE-2024-26925.