CVE-2011-2525

Name: CVE-2011-2525
Creator: NVD / NIST
Published: 2012-02-02T04:09:47.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.50%

Last modified Jun 16, 2026

CVE-2011-2525 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.50%

38.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 2.6.35
Redhat	Enterprise Linux	4.0

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3
http://kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805Broken Link
http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35Broken Link
http://openwall.com/lists/oss-security/2011/07/12/1Mailing List, Patch, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2011-1065.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2011-1163.htmlThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=720552Issue Tracking, Patch, Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3
http://kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805Broken Link
http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35Broken Link
http://openwall.com/lists/oss-security/2011/07/12/1Mailing List, Patch, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2011-1065.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2011-1163.htmlThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=720552Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Feb 2, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-2525?

How severe is CVE-2011-2525?

CVE-2011-2525 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2011-2525?

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-2011-2525?

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

Scan your code now

Source: NVD / NIST