SB20261022332 - Integer underflow in Linux kernel nvme host driver

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Main Vulnerability Database SB20261022332

SB20261022332 - Integer underflow in Linux kernel nvme host driver

Published: October 22, 2026

Security Bulletin ID SB20261022332
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer underflow (CVE-ID: CVE-2026-98726)

CWE-ID: CWE-191 - Integer underflow

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


The vulnerability allows a local privileged user to trigger out-of-bounds kernel memory reads, potentially causing a denial of service or disclosing sensitive information.

The vulnerability exists due to integer underflow in the Linux kernel NVMe multipath ANA log parser when processing inconsistent controller-supplied ANA data. A local privileged user can supply malformed ANA data with object sizes exceeding the allocated log buffer to bypass bounds checks and trigger reads beyond ana_log_buf while parsing group descriptors or namespace ID arrays.


Remediation

Install update from vendor's website.

References