SB20261022430 - Use-after-free in Linux kernel nvme host driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98814)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to use-after-free in the Linux kernel NVMe command effects log handling when processing an I/O passthrough command through a multipath namespace head after the controller path that first created the head has been removed. A local user can submit an I/O passthrough command through the remaining namespace head to trigger a read from freed log memory, potentially causing a kernel crash.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/351d1c47e45b2b35780d0548b1012d7242ba298d
• https://git.kernel.org/stable/c/72ece656abd4de8645a421fb482d7a11e6533a45