CVE-2026-45857 scsi: csiostor: Fix dereference of null pointer rn
A null pointer dereference in the csiostor SCSI driver can cause a kernel crash, leading to 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-2026-45857?
CVE-2026-45857 is a medium-severity vulnerability in Linux kernel, published on 27 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:
scsi: csiostor: Fix dereference of null pointer rn
The error exit path when rn is NULL ends up deferencing the null pointer rn via the use of the macro CSIO_INC_STATS. Fix this by adding a new error return path label after the use of the macro to avoid the deference.
Weakness: CWE-476
Which versions are affected by CVE-2026-45857?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-45857?
Apply the vendor's patch.
Is CVE-2026-45857 being exploited?
There is no known exploitation of CVE-2026-45857 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-45857, DEBIAN-CVE-2026-45857, GHSA-fwvx-v57v-gvmw, ROOT-OS-DEBIAN-11-CVE-2026-45857, ROOT-OS-UBUNTU-2204-CVE-2026-45857, ROOT-OS-UBUNTU-2404-CVE-2026-45857 and 1 more.