CVE-2026-43132 dm-verity: correctly handle dm_bufio_client_create() failure
A null pointer dereference in the Linux kernel dm-verity module causes a system crash when buffer I/O client creation fails.
- 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-2026-43132?
CVE-2026-43132 is a medium-severity vulnerability in Linux kernel, published on 6 May 2026. 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:
dm-verity: correctly handle dm_bufio_client_create() failure
If either of the calls to dm_bufio_client_create() in verity_fec_ctr() fails, then dm_bufio_client_destroy() is later called with an ERR_PTR() argument. That causes a crash. Fix this.
Which versions are affected by CVE-2026-43132?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43132?
Apply the vendor's patch.
Is CVE-2026-43132 being exploited?
There is no known exploitation of CVE-2026-43132 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43132, DEBIAN-CVE-2026-43132, GHSA-xwqw-f775-g672, ROOT-OS-DEBIAN-11-CVE-2026-43132, ROOT-OS-UBUNTU-2204-CVE-2026-43132, ROOT-OS-UBUNTU-2404-CVE-2026-43132 and 1 more.