Description
Multiple integer overflows in tools/libxc/xc_dom_bzimageloader.c in Xen 3.2, 3.3, 4.0, and 4.1 allow local users to cause a denial of service and possibly execute arbitrary code via a crafted paravirtualised guest kernel image that triggers (1) a buffer overflow during a decompression loop or (2) an out-of-bounds read in the loader involving unspecified length fields.
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 | 4.1.1-1 | — |
| Debian 13 | xen | 4.1.1-1 | — |
| Debian 12 | xen | 4.1.1-1 | — |
| Debian 6.0 | xen | 4.0.1-4 | DSA-2337-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | xen +1 | 3.0.3-120.el5_6.2 | RHSA-2011:0496 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Virtualization 5 | xen +1 | 3.0.3-120.el5_6.2 | RHSA-2011:0496 |
Advisories 2
- RHSA-2011:0496 Red Hat Security Advisory: xen security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2337-1 xen - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026