What is CVE-2011-2519?

CVE-2011-2519 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2011-2519 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-2519?

CVE-2011-2519 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is AV:A/AC:L/Au:S/C:N/I:N/A:C.

Is there a patch available for CVE-2011-2519?

No patch is currently available for CVE-2011-2519. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-2519 actively exploited?

CVE-2011-2519 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2011-2519

Medium

Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.

Package Linux Kernel

Published 2013-12-27

Last modified 2026-04-29

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

5.5

out of 10

Medium

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

Vector string

AV:A/AC:L/Au:S/C:N/I:N/A:C

Weakness type

CWE-476

CVE-2011-2519 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2011-2519 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
http://rhn.redhat.com/errata/RHSA-2011-1212.html

Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2011/08/30/1

Mailing List Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=718882

Issue Tracking Third Party Advisory
Kernel patch commit
http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644
Patch

Details

CVE ID CVE-2011-2519

Severity Medium

CVSS score 5.5 / 10

CVSS version 2.0

Published 2013-12-27

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-2519?

CVE-2011-2519 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2011-2519 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-2519?

CVE-2011-2519 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:A/AC:L/Au:S/C:N/I:N/A:C.
Is there a patch available for CVE-2011-2519?

No patch is currently available for CVE-2011-2519. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-2519 actively exploited?

No — CVE-2011-2519 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →