Description
The PyGrub boot loader in Xen unstable before changeset 25589:60f09d1ab1fe, 4.2.x, and 4.1.x allows local para-virtualized guest users to cause a denial of service (memory consumption) via a large (1) bzip2 or (2) lzma compressed kernel image.
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 | xen | 4.1.3-4 | — |
| Debian 13 | xen | 4.1.3-4 | — |
| Debian 12 | xen | 4.1.3-4 | — |
| Debian 6.0 | xen | 4.0.1-5.7 | DSA-2636-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | xen +1 | 3.0.3-135.el5_8.4 | RHSA-2012:1130 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Virtualization 5 | xen +1 | 3.0.3-135.el5_8.4 | RHSA-2012:1130 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.7.0_12-1.3 | openSUSE-SU-2024:10196-1 |
Advisories 3
- RHSA-2012:1130 Red Hat Security Advisory: xen security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2636-1 xen - several Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10196-1 xen-4.7.0_12-1.3 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- [oss-security] 20121026 Xen Security Advisory 25 (CVE-2012-4544) - Xen domain builder Out-of-memory due to malicious kernel/ramdisk mailing-list
- RHSA-2012:1130 vendor-advisory
- 51413 third-party-advisory
- http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1817
- SUSE-SU-2012:1135 vendor-advisory
- SUSE-SU-2012:1044 vendor-advisory
- 53650 vdb-entry
- openSUSE-SU-2012:1572 vendor-advisory
- 1027090 vdb-entry
- SUSE-SU-2012:1043 vendor-advisory
- openSUSE-SU-2012:1174 vendor-advisory
- http://xenbits.xensource.com/hg/xen-unstable.hg/rev/60f09d1ab1fe
- openSUSE-SU-2012:1573 vendor-advisory
- 49184 third-party-advisory
- openSUSE-SU-2012:1172 vendor-advisory