Description
OpenStack Compute (Nova) Folsom, Grizzly, and Havana, when use_cow_images is set to False, does not verify the virtual size of a QCOW2 image, which allows local users to cause a denial of service (host file system disk consumption) by transferring an image with a large virtual size that does not contain a large amount of data from Glance. NOTE: this issue is due to an incomplete fix for CVE-2013-2096.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nova | 2013.2-3 | — |
| Debian 13 | nova | 2013.2-3 | — |
| Debian 12 | nova | 2013.2-3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | nova | 1:2014.1-0ubuntu1.2 | USN-2247-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | nova | < 12.0.0a0 | 12.0.0a0 | GHSA-2w87-5qcj-j6gx |
Advisories 1
- USN-2247-1 nova vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026