CVE-2025-22122 block: fix adding folio to bio
An integer overflow in the Linux kernel block layer can cause I/O failures when handling large folios on architectures supporting hugepages.
- 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-2025-22122?
CVE-2025-22122 is a medium-severity vulnerability in Linux kernel, published on 16 Apr 2025. 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:
block: fix adding folio to bio
>4GB folio is possible on some ARCHs, such as aarch64, 16GB hugepage is supported, then 'offset' of folio can't be held in 'unsigned int', cause warning in bio_add_folio_nofail() and IO failure.
Fix it by adjusting 'page' & trimming 'offset' so that `->bi_offset` won't be overflow, and folio can be added to bio successfully.
Which versions are affected by CVE-2025-22122?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-22122?
Apply the vendor's patch.
Is CVE-2025-22122 being exploited?
There is no known exploitation of CVE-2025-22122 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-22122, DEBIAN-CVE-2025-22122, GHSA-cjw9-x8qr-5wpf, UBUNTU-CVE-2025-22122.