DEBIAN-CVE-2026-89768

In the Linux kernel, the following vulnerability has been resolved: fs: fix user path of nested backing files backingfileopen derives the path to be stored in the new backing file from userfile-fpath. This is incorrect when userfile itself is a backing file, which is the case for nested stacking...

CVE-2026-89768

In the Linux kernel, the following vulnerability has been resolved: fs: fix user path of nested backing files backingfileopen derives the path to be stored in the new backing file from userfile-fpath. This is incorrect when userfile itself is a backing file, which is the case for nested stacking...

PYSEC-2026-874 OpenStack Nova DoS through ephemeral disk backing files

The libvirt driver in OpenStack Compute Nova before 2013.2.2 and icehouse before icehouse-2 allows remote authenticated users to cause a denial of service disk consumption by creating and deleting instances with unique ostype settings, which triggers the creation of a new ephemeral disk backing...

OpenStack: malicious qcow2/vmdk images

An input validation flaw was discovered in how multiple OpenStack services validate images with backing file references. An authenticated attacker could provide a malicious image via upload, or by creating and modifying an image from an existing volume. Validation of images can be triggered durin...

nova: Live migration can leak root disk into ephemeral storage

The icreateimagesandbacking aka createimagesandbacking method in libvirt driver in OpenStack Compute Nova Grizzly, Havana, and Icehouse, when using KVM live block migration, does not properly create all expected files, which allows attackers to obtain snapshot root disk contents of other users vi...