Description
The backend for XenSource Xen Para Virtualized Frame Buffer (PVFB) in Xen ioemu does not properly restrict the frame buffer size, which allows attackers to cause a denial of service (crash) by mapping an arbitrary amount of guest memory.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | xen +1 | 3.0.3-64.el5_2.3 | RHSA-2008:0892 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Virtualization 5 | xen +1 | 3.0.3-64.el5_2.3 | RHSA-2008:0892 |
Advisories 1
- RHSA-2008:0892 Red Hat Security Advisory: xen security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 32088 third-party-advisory
- [oss-security] 20080521 New Xen ioemu: PVFB backend issue mailing-list
- http://xenbits.xensource.com/xen-unstable.hg?rev/9044705960cb30cec385bdca7305bcf7db096721
- oval:org.mitre.oval:def:11189 vdb-entry signature
- 1020957 vdb-entry
- [Xen-devel] 20080521 [PATCH] ioemu: Fix PVFB backend to limit frame buffer size mailing-list
- xen-pvfb-ioemu-dos(43362) vdb-entry
- RHSA-2008:0892 vendor-advisory
- 30646 vdb-entry