SB20260928144 - Inefficient Algorithmic Complexity in Linux kernel nvme host driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928144
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Inefficient Algorithmic Complexity (CVE-ID: CVE-2026-98056)
CWE-ID: CWE-407 - Inefficient Algorithmic Complexity
CVSSv4: 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]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient algorithmic complexity in nvme_scan_ns_list() when processing a reported NVMe namespace identifier list with sparse gaps. A remote attacker can provide a namespace list containing a large sparse namespace identifier gap to cause a denial of service.
Remediation
Install update from vendor's website.