Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-89971

Vulnerability identifier: #VU150321

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-89971

CWE-ID: CWE-754

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper handling of positive NVMe status codes in nvme_update_ns_info_block() when processing a failed NVMe zone information query. A remote attacker can cause the zone information query to fail, resulting in a zoned queue with a zero zone size.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.113-1

• https://git.kernel.org/stable/c/3838e80fcfb32e62baffb63c6dc0a60153665a4d
• https://git.kernel.org/stable/c/7fad53ae2052a2b4fc7ca567d6555bdb1176ba35
• https://git.kernel.org/stable/c/bb6dafa79040357cf5043836e1db108c2af8b1e1

• Improper Check for Unusual or Exceptional Conditions in Linux kernel nvme host driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more