SB2026032092 - Missing release of memory after effective lifetime in Linux kernel nvme host driver

Description

This security bulletin contains information about 1 security vulnerability.

1) Missing release of memory after effective lifetime (CVE-ID: CVE-2026-23261)

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper memory resource management in the NVMe/FC controller initialization component when processing controller setup operations. A local user can trigger a failure during controller initialization to cause a denial of service.

The issue arises because the admin tagset is not released if initialization fails, leading to memory resource leaks. This requires the ability to create and initialize an NVMe/FC controller, which is restricted to users with appropriate privileges.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea
• https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8
• https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3
• https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01