SB2026091912 - Race condition in Linux kernel nvme target driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-90206)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to cause memory corruption.

The vulnerability exists due to a race condition in NVMe target controller allocation when changing a subsystem's max_qid limit during controller allocation. A local privileged user can concurrently modify the max_qid configuration and allocate a controller to cause memory corruption.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2c23fc91789dfd9db746edb3ae9b90d65fabd410
• https://git.kernel.org/stable/c/f1a8846e06388113dfdbb89dee005083fa9afdf9