Description
The Hypervisor (aka rhev-hypervisor) in Red Hat Enterprise Virtualization (RHEV) 2.2, and KVM 83, when the Intel VT-x extension is enabled, allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) via vectors related to instruction emulation.
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 5.0 | linux-2.6 | 2.6.26-26lenny2 | DSA-2153-1 |
| Debian 5.0 | user-mode-linux | 2.6.26-1um-2+26lenny2 | DSA-2153-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | rhev-hypervisor +1 | 5.5-2.2.6.1.el5_5rhev2_2 | RHSA-2010:0622 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Virtualization 5 | kvm +3 | 83-164.el5_5.21 | RHSA-2010:0627 |
Advisories 3
- RHSA-2010:0627 Red Hat Security Advisory: kvm security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0622 Red Hat Security Advisory: rhev-hypervisor security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-2153-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- RHSA-2010:0627 vendor-advisory
- 42778 third-party-advisory
- RHSA-2010:0622 vendor-advisory
- SUSE-SA:2011:001 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=570528
- ADV-2011-0012 vdb-entry