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CVE-2011-2525

7.8 · HIGH

The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not prevent tc_fill_qdisc function calls referencing builtin (aka CQ_F_BUILTIN) Qdisc structures, which allow…

Published Feb 2, 2012linuxCWE-476EPSS 0.48%

Overview

CVE-2011-2525 is a high-severity vulnerability affecting linux linux_kernel. It was published on February 2, 2012 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not prevent tc_fill_qdisc function calls referencing builtin (aka CQ_F_BUILTIN) Qdisc structures, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact via a crafted call.

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, < 2.6.35Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3Refkerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805Refmirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35Refopenwall.com/lists/oss-security/2011/07/12/1Refrhn.redhat.com/errata/RHSA-2011-1065.htmlRefrhn.redhat.com/errata/RHSA-2011-1163.htmlRefbugzilla.redhat.com/show_bug.cgi?id=720552Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3Refkerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805Refmirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35

How CyberStrike helps

Frequently asked questions

What is CVE-2011-2525?

CVE-2011-2525 is a high-severity vulnerability affecting linux linux_kernel. It was published on February 2, 2012 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2011-2525?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2011-2525?

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-2011-2525?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-2525 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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