Description
The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value.
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 | 4.1.3-5 | — |
| Debian 13 | xen | 4.1.3-5 | — |
| Debian 12 | xen | 4.1.3-5 | — |
| Debian 6.0 | xen | 4.0.1-5.5 | DSA-2582-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-348.1.1.el5 | RHSA-2013:0168 |
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-2013:0168 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2582-1 xen - denial of service 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
- SUSE-SU-2014:0470 vendor-advisory
- xen-extentorder-dos(80479) vdb-entry
- 55082 third-party-advisory
- openSUSE-SU-2013:0133 vendor-advisory
- openSUSE-SU-2013:0637 vendor-advisory
- http://support.citrix.com/article/CTX135777
- GLSA-201309-24 vendor-advisory
- DSA-2582 vendor-advisory
- 51397 third-party-advisory
- openSUSE-SU-2012:1685 vendor-advisory
- 51486 third-party-advisory
- 51487 third-party-advisory
- [Xen-announce] 20121203 Xen Security Advisory 31 (CVE-2012-5515) - Several memory hypercall operations allow invalid extent order values mailing-list
- 56798 vdb-entry
- 88127 vdb-entry
- 51468 third-party-advisory
- openSUSE-SU-2013:0636 vendor-advisory
- SUSE-SU-2014:0446 vendor-advisory
- openSUSE-SU-2012:1687 vendor-advisory
- SUSE-SU-2012:1615 vendor-advisory
- [oss-security] 20121203 Xen Security Advisory 31 (CVE-2012-5515) - Several memory hypercall operations allow invalid extent order values mailing-list
- 51495 third-party-advisory
- SUSE-SU-2012:1606 vendor-advisory