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CVE-2011-0521

7.2 · 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…

Published Feb 2, 2011linuxCWE-119EPSS 0.40%

Overview

CVE-2011-0521 is a high-severity vulnerability affecting linux linux_kernel. It was published on February 2, 2011 and has a CVSS 2.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 0, < 2.6.38Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cb26a24ee9706473f31d34cc259f4dcf45cd0644Refopenwall.com/lists/oss-security/2011/01/24/2Refopenwall.com/lists/oss-security/2011/01/25/2Refsecunia.com/advisories/43009Refsecunia.com/advisories/46397Refwww.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.38-rc2Refwww.securityfocus.com/archive/1/520102/100/0/threadedRefwww.securityfocus.com/bid/45986Refwww.securitytracker.com/id?1025195Refwww.vmware.com/security/advisories/VMSA-2011-0012.html

How CyberStrike helps

Frequently asked questions

What is CVE-2011-0521?

CVE-2011-0521 is a high-severity vulnerability affecting linux linux_kernel. It was published on February 2, 2011 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2011-0521?

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-0521?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-0521?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-0521 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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