CVE-2013-4361

Severity: low (CVSS 2.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-10-01 · updated 2026-06-16
Weakness: CWE-200

Description

The fbld instruction emulation in Xen 3.3.x through 4.3.x does not use the correct variable for the source effective address, which allows local HVM guests to obtain hypervisor stack information by reading the values used by the instruction.

Affected products

xen: 3.3.0, 3.3.1, 3.3.2, 3.4.0, 3.4.1, 3.4.2 (+17)

References

http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00009.html
http://security.gentoo.org/glsa/glsa-201407-03.xml
http://www.debian.org/security/2014/dsa-3006
http://www.openwall.com/lists/oss-security/2013/09/30/3
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00009.html
http://security.gentoo.org/glsa/glsa-201407-03.xml
http://www.debian.org/security/2014/dsa-3006
http://www.openwall.com/lists/oss-security/2013/09/30/3

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