SB2026022004 - Debian update for nova
Published: February 20, 2026
Security Bulletin ID
SB2026022004
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Allocation of resources without limits or throttling (CVE-ID: CVE-2026-24708)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to the application calls qemu-img without format restrictions for resize. A local user can write malicious QCOW header to a root or ephemeral disk and then trigger a resize to convince Nova’s flat image backend to call qemu-img without a format restriction resulting in an unsafe image resize operation that could destroy data on the host system.
Remediation
Install update from vendor's website.