What is CVE-2011-0521?

CVE-2011-0521 is a High severity Linux kernel vulnerability with a CVSS score of 7.2 out of 10, classified as a Buffer Overflow flaw (CWE-119). CVE-2011-0521 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-0521?

CVE-2011-0521 has a CVSS score of 7.2 out of 10, rated High severity. The vector string is AV:L/AC:L/Au:N/C:C/I:C/A:C.

Is there a patch available for CVE-2011-0521?

No patch is currently available for CVE-2011-0521. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-0521 actively exploited?

CVE-2011-0521 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2011-0521

High

The dvb_ca_ioctl function in drivers/media/dvb/ttpci/av7110_ca.c in the Linux kernel before 2.6.38-rc2 does not check the sign of a certain integer field, which allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a negative value.

Package Linux Kernel

Published 2011-02-02

Last modified 2026-04-29

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

7.2

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

Availability

Vector string

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

Weakness type

CWE-119

CVE-2011-0521 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2011-0521 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Secunia
http://secunia.com/advisories/43009

Third Party Advisory
Secunia
http://secunia.com/advisories/46397

Third Party Advisory
Kernel.org
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.38-rc2

Broken Link
Securityfocus
http://www.securityfocus.com/archive/1/520102/100/0/threaded

Third Party Advisory VDB Entry
Securityfocus
http://www.securityfocus.com/bid/45986

Third Party Advisory VDB Entry
Securitytracker
http://www.securitytracker.com/id?1025195

Third Party Advisory VDB Entry
Vmware
http://www.vmware.com/security/advisories/VMSA-2011-0012.html

Third Party Advisory
Exchange
https://exchange.xforce.ibmcloud.com/vulnerabilities/64988

Third Party Advisory VDB Entry
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cb26a24ee9706473f31d34cc259f4dcf45cd0644
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/01/24/2
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/01/25/2
Patch

Details

CVE ID CVE-2011-0521

Severity High

CVSS score 7.2 / 10

CVSS version 2.0

Published 2011-02-02

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-0521?

CVE-2011-0521 is a High severity Linux kernel vulnerability with a CVSS score of 7.2 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . CVE-2011-0521 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-0521?

CVE-2011-0521 has a CVSS score of 7.2 out of 10, rated High severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:C/I:C/A:C.
Is there a patch available for CVE-2011-0521?

No patch is currently available for CVE-2011-0521. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-0521 actively exploited?

No — CVE-2011-0521 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. View CWE-119 on MITRE CWE →