SB20261022333 - Incorrect Bitwise Shift of Integer in Linux kernel nvme host driver

Description

This security bulletin contains information about 1 vulnerability.

1) Incorrect Bitwise Shift of Integer (CVE-ID: CVE-2026-98727)

CWE-ID: CWE-1335 - Incorrect Bitwise Shift of Integer

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 trigger undefined kernel behavior that may result in a denial of service.

The vulnerability exists due to an invalid bitwise shift in the Linux kernel NVMe multipath component when reporting zones or processing writes through a namespace head that advertises zoned capability with a zero zone size. A local user can trigger these operations on an affected namespace head to cause a shift by ilog2(0), potentially resulting in a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2d86abd28071481a1abd87204a47325975dc821c
• https://git.kernel.org/stable/c/44dc998c38fb5e153c3ed5665f1112661841c3f5
• https://git.kernel.org/stable/c/4a5e49ba0abb8b4328d6318c9aef0c0121f95507
• https://git.kernel.org/stable/c/8b85838c1fdba5ba90152693ca158aa9660c628f