What is CVE-2011-0709?

CVE-2011-0709 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2011-0709 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-0709?

CVE-2011-0709 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2011-0709?

No patch is currently available for CVE-2011-0709. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-0709 actively exploited?

CVE-2011-0709 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-2011-0709

High

The br_mdb_ip_get function in net/bridge/br_multicast.c in the Linux kernel before 2.6.35-rc5 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an IGMP packet, related to lack of a multicast table.

Package Linux Kernel

Published 2011-02-18

Last modified 2026-04-29

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2011-0709 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-2011-0709 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
http://openwall.com/lists/oss-security/2011/02/16/14

Mailing List Third Party Advisory
Kernel.org
http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.35/ChangeLog-2.6.35-rc5

Broken Link
Securityfocus
http://www.securityfocus.com/bid/41432

Third Party Advisory VDB Entry
Spinics
http://www.spinics.net/lists/netdev/msg134414.html

Exploit Mailing List Third Party Advisory
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7f285fa78d4b81b8458f05e77fb6b46245121b4e
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/02/16/1
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/02/16/8
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2011-0709

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2011-02-18

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-0709?

CVE-2011-0709 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2011-0709 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-0709?

CVE-2011-0709 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2011-0709?

No patch is currently available for CVE-2011-0709. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-0709 actively exploited?

No — CVE-2011-0709 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 →