| Name | CVE-2026-24708 |
| Description | An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may 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. Only compute nodes using the Flat image backend (usually configured with use_cow_images=False) are affected. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4486-1, DSA-6145-1 |
| Debian Bugs | 1128294 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| nova (PTS) | bullseye | 2:22.0.1-2+deb11u1 | vulnerable |
| bullseye (security) | 2:22.4.0-1~deb11u7 | fixed |
| bookworm, bookworm (security) | 2:26.2.2-1~deb12u4 | fixed |
| trixie (security), trixie | 2:31.0.0-6+deb13u2 | fixed |
| forky, sid | 2:33.0.1-4 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://www.openwall.com/lists/oss-security/2026/02/17/7
https://review.opendev.org/977100
