Description
The xen_failsafe_callback function in Xen for the Linux kernel 2.6.23 and other versions, when running a 32-bit PVOPS guest, allows local users to cause a denial of service (guest crash) by triggering an iret fault, leading to use of an incorrect stack pointer and stack corruption.
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 | linux | 3.2.39-1 | — |
| Debian 13 | linux | 3.2.39-1 | — |
| Debian 12 | linux | 3.2.39-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +15 | 2.6.32-358.el6 | RHSA-2013:0496 |
Advisories 1
- RHSA-2013:0496 Red Hat Security Advisory: Red Hat Enterprise Linux 6 kernel update Red Hat Security Advisories (RHSA) · Jun 28, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=896038
- RHSA-2013:0496 vendor-advisory
- USN-1728-1 vendor-advisory
- USN-1725-1 vendor-advisory
- [oss-security] 20130116 [PATCH] xen: Fix stack corruption in xen_failsafe_callback for 32bit PVOPS guests. mailing-list
- [oss-security] 20130116 Xen Security Advisory 40 (CVE-2013-0190) - Linux stack corruption in xen_failsafe_callback for 32bit PVOPS guests. mailing-list
- 57433 vdb-entry