Description
Off-by-one error in the __addr_ok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service (host crash) via unspecified hypercalls that ignore virtual-address bits.
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 +11 | 2.6.18-274.3.1.el5 | RHSA-2011:1212 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5.6 EUS | kernel +11 | 2.6.18-238.31.1.el5 | RHSA-2011:1813 |
Advisories 2
- RHSA-2011:1813 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:1212 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
References
- 55082 third-party-advisory
- [oss-security] 20110902 Xen Security Advisory 4 (CVE-2011-2901) - Xen 3.3 vaddr validation mailing-list
- GLSA-201309-24 vendor-advisory
- RHSA-2011:1212 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=728042