Description
The qcow2_open function in the (block/qcow2.c) in QEMU before 1.7.2 and 2.x before 2.0.0 allows local users to cause a denial of service (NULL pointer dereference) via a crafted image which causes an error, related to the initialization of the snapshot_offset and nb_snapshots fields.
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 | qemu | 2.0.0+dfsg-1 | — |
| Debian 13 | qemu | 2.0.0+dfsg-1 | — |
| Debian 12 | qemu | 2.0.0+dfsg-1 | — |
| Debian 7 | qemu | 1.1.2+dfsg-6a+deb7u4 | DSA-3045-1 |
| Debian 7 | qemu-kvm | 1.1.2+dfsg-6+deb7u4 | DSA-3044-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.3 | USN-2342-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | qemu-img +6 | 2:0.12.1.2-2.415.el6_5.8 | RHSA-2014:0421, RHSA-2014:0420 |
| RHEL 6 | rhev-hypervisor6 | 6.5-20140603.2.el6ev | RHSA-2014:0674 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 4 | qemu-img-rhev +2 | 2:0.12.1.2-2.415.el6_5.8 | RHSA-2014:0434 |
| Red Hat OpenStack 3 | qemu-img-rhev +2 | 2:0.12.1.2-2.415.el6_5.8 | RHSA-2014:0435 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 2.6.1-1.5 | openSUSE-SU-2024:10233-1 |
Advisories 9
- RHSA-2014:0674 Red Hat Security Advisory: rhev-hypervisor6 3.4.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0434 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0435 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0421 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0420 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-3045-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3044-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2342-1 qemu, qemu-kvm vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10233-1 qemu-2.6.1-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=11b128f4062dd7f89b14abc8877ff20d41b28be9
- RHSA-2014:0420 vendor-advisory
- RHSA-2014:0421 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1078232
- DSA-3044 vendor-advisory
- [oss-security] 20140326 QEMU image format input validation fixes (multiple CVEs) mailing-list