Description
The instruction emulation in Xen 3.0.3 allows local SMP guest users to cause a denial of service (host crash) by replacing the instruction that causes the VM to exit in one thread with a different instruction in a different thread.
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 | kernel +12 | 2.6.18-238.21.1.el5 | RHSA-2011:1163, RHSA-2011:1065 |
Advisories 2
- RHSA-2011:1065 Red Hat Security Advisory: Red Hat Enterprise Linux 5.7 kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2011:1163 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Feb 19, 2026
References
- RHSA-2011:1065 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=702657
- [oss-security] 20110707 CVE-2011-1780, CVE-2011-1936, kernel/xen issues mailing-list
- RHSA-2011:1163 vendor-advisory