CVE-2013-1943

Name: CVE-2013-1943
Creator: NVD / NIST
Published: 2013-07-16T14:08:50.933+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.45%

Last modified Jun 16, 2026

CVE-2013-1943 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The KVM subsystem in the Linux kernel before 3.0 does not check whether kernel addresses are specified during allocation of memory slots for use in a guest's physical address space, which allows local users to gain privileges or obtain sensitive information from kernel memory via a crafted application, related to arch/x86/kvm/paging_tmpl.h and virt/kvm/kvm_main.c.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

The KVM subsystem in the Linux kernel before 3.0 does not check whether kernel addresses are specified during allocation of memory slots for use in a guest's physical address space, which allows local users to gain privileges or obtain sensitive information from kernel memory via a crafted application, related to arch/x86/kvm/paging_tmpl.h and virt/kvm/kvm_main.c.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.45%

35.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 3.0
Redhat	Enterprise Linux	5.0
Redhat	Enterprise Linux Eus	6.2
Redhat	Enterprise Linux Eus	6.3
Canonical	Ubuntu Linux	10.04

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fa3d315a4ce2c0891cdde262562e710d95fba19e
http://web.archive.org/web/20130329070349/http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0Broken Link
http://www.ubuntu.com/usn/USN-1939-1Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=950490Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/fa3d315a4ce2c0891cdde262562e710d95fba19ePatch, Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fa3d315a4ce2c0891cdde262562e710d95fba19e
http://web.archive.org/web/20130329070349/http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0Broken Link
http://www.ubuntu.com/usn/USN-1939-1Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=950490Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/fa3d315a4ce2c0891cdde262562e710d95fba19ePatch, Third Party Advisory

Timeline

Published: Jul 16, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-1943?

How severe is CVE-2013-1943?

CVE-2013-1943 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2013-1943?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-1943?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST