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CVE-2011-2723

21
FAUCET Score

CVE-2011-2723 describes a denial-of-service vulnerability in the Linux kernel versions prior to 2.6.39.4, specifically within the skb_gro_header_slow function when Generic Receive Offload (GRO) is enabled. This flaw allows remote attackers to crash the system via specially crafted network traffic due to incorrect field resets. The vulnerability has a CVSS score of 5.7, indicating a medium severity with an adjacent network attack vector and medium attack complexity, leading to a complete system availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.6.39.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.7MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
5.5
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0111 is in the 97th percentile among its peer group of 1,749 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.0 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-238.27.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-274.7.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-131.17.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-0:2.6.33.9-rt31.79.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2011-2723Moderate

kernel: gro: only reset frag0 when skb can be pulled

Jul 27, 2011

References

git.kernel.org
marc.info
Third Party Advisory
openwall.com / lists/oss-security/2011/07/28/13
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2011/07/29/1
Mailing ListPatchThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
securitytracker.com / id
Third Party AdvisoryVDB Entry
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.39.4
Broken Link
redhat.com / support/errata/RHSA-2011-1321.html
Third Party Advisory
securityfocus.com / bid/48929
Third Party AdvisoryVDB Entry