What is CVE-2011-2525?

CVE-2011-2525 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2011-2525 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-2525?

CVE-2011-2525 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2011-2525?

No patch is currently available for CVE-2011-2525. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-2525 actively exploited?

CVE-2011-2525 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-2011-2525

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 allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact via a crafted call.

Package Linux Kernel

Published 2012-02-02

Last modified 2026-04-29

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2011-2525 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-2011-2525 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kerneltrap
http://kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805

Broken Link
Mirror
http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35

Broken Link
Red Hat
http://rhn.redhat.com/errata/RHSA-2011-1065.html

Third Party Advisory
Red Hat
http://rhn.redhat.com/errata/RHSA-2011-1163.html

Third Party Advisory
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/07/12/1
Patch
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=720552
Patch

Details

CVE ID CVE-2011-2525

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2012-02-02

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-2525?

CVE-2011-2525 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2011-2525 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-2525?

CVE-2011-2525 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2011-2525?

No patch is currently available for CVE-2011-2525. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-2525 actively exploited?

No — CVE-2011-2525 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 →