CVE-2026-43473 scsi: mpi3mr: Add NULL checks when resetting request and reply queues

What is CVE-2026-43473?

CVE-2026-43473 is a medium-severity vulnerability in Linux kernel, published on 8 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: mpi3mr: Add NULL checks when resetting request and reply queues

The driver encountered a crash during resource cleanup when the reply and request queues were NULL due to freed memory. This issue occurred when the creation of reply or request queues failed, and the driver freed the memory first, but attempted to mem set the content of the freed memory, leading to a system crash.

Add NULL pointer checks for reply and request queues before accessing the reply/request memory during cleanup

Weakness: CWE-476

Which versions are affected by CVE-2026-43473?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-43473?

Apply the vendor's patch.

Is CVE-2026-43473 being exploited?

There is no known exploitation of CVE-2026-43473 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as BELL-CVE-2026-43473, DEBIAN-CVE-2026-43473, GHSA-4rpc-8842-rq53, ROOT-OS-UBUNTU-2204-CVE-2026-43473, ROOT-OS-UBUNTU-2404-CVE-2026-43473, UBUNTU-CVE-2026-43473.