Description
Xen 4.1.x and 4.2.x, when the XSA-45 patch is in place, does not properly maintain references on pages stored for deferred cleanup, which allows local PV guest kernels to cause a denial of service (premature page free and hypervisor crash) or possibly gain privileges via unspecified vectors.
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 | 4.3.0-1 | — |
| Debian 13 | xen | 4.3.0-1 | — |
| Debian 12 | xen | 4.3.0-1 | — |
| Debian 7 | xen | 4.1.4-3+deb7u2 | DSA-3006-1 |
Advisories 1
- DSA-3006-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 55082 third-party-advisory
- GLSA-201309-24 vendor-advisory
- [oss-security] 20130626 Xen Security Advisory 58 (CVE-2013-1432) - Page reference counting error due to XSA-45/CVE-2013-1918 fixes mailing-list
- http://support.citrix.com/article/CTX138134
- SUSE-SU-2014:0446 vendor-advisory
- DSA-3006 vendor-advisory