What is CVE-2011-2723?

CVE-2011-2723 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.7 out of 10, classified as a Improper Input Validation flaw (CWE-20). CVE-2011-2723 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-2723?

CVE-2011-2723 has a CVSS score of 5.7 out of 10, rated Medium severity. The vector string is AV:A/AC:M/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2011-2723?

No patch is currently available for CVE-2011-2723. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-2723 actively exploited?

CVE-2011-2723 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2011-2723

Medium

The skb_gro_header_slow function in include/linux/netdevice.h in the Linux kernel before 2.6.39.4, when Generic Receive Offload (GRO) is enabled, resets certain fields in incorrect situations, which allows remote attackers to cause a denial of service (system crash) via crafted network traffic.

Package Linux Kernel

Published 2011-09-06

Last modified 2026-04-29

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

5.7

out of 10

Medium

Attack Vector

Adjacent

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

None

Integrity

None

Availability

Vector string

AV:A/AC:M/Au:N/C:N/I:N/A:C

Weakness type

CWE-20

CVE-2011-2723 is a Improper Input Validation vulnerability

What is Improper Input Validation?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2011-2723 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Marc
http://marc.info/?l=bugtraq&m=139447903326211&w=2

Third Party Advisory
Securitytracker
http://securitytracker.com/id?1025876

Third Party Advisory VDB Entry
Kernel.org
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4

Broken Link
Red Hat
http://www.redhat.com/support/errata/RHSA-2011-1321.html

Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/48929

Third Party Advisory VDB Entry
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=17dd759c67f21e34f2156abcf415e1f60605a188
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/07/28/13
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/07/29/1
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2011-2723

Severity Medium

CVSS score 5.7 / 10

CVSS version 2.0

Published 2011-09-06

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-2723?

CVE-2011-2723 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.7 out of 10 , classified as an Improper Input Validation flaw (CWE-20) . CVE-2011-2723 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-2723?

CVE-2011-2723 has a CVSS score of 5.7 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:A/AC:M/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2011-2723?

No patch is currently available for CVE-2011-2723. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-2723 actively exploited?

No — CVE-2011-2723 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Improper Input Validation (CWE-20)?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. View CWE-20 on MITRE CWE →