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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2:31.0.0-6+deb13u2 |
| sid | Fixed | 2:32.1.0-7 |
| forky | Fixed | 2:32.1.0-7 |
| bullseye | Fixed | 2:22.4.0-1~deb11u7 |
| bookworm | Fixed | 2:26.2.2-1~deb12u4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-24708
- https://github.com/openstack/nova/commit/3eba22ff09c81a61750fbb4882e5f1f01a20fdf5
- https://bugs.launchpad.net/nova/+bug/2137507
- https://github.com/openstack/nova
- https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html
- https://www.openwall.com/lists/oss-security/2026/02/17/7
- https://security-tracker.debian.org/tracker/CVE-2026-24708
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.