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CVE-2009-4537

26
FAUCET Score

CVE-2009-4537 is a denial-of-service vulnerability in the r8169 driver (drivers/net/r8169.c) of the Linux kernel, affecting versions 2.6.32.3 and earlier, including Debian distributions. It stems from improper handling of Ethernet frames exceeding the MTU, allowing remote attackers to cause temporary network outages or system crashes. With a CVSS score of 7.8 (High), this vulnerability is remotely exploitable with low attack complexity, leading to complete availability impact. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.32.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.89%
Probability of exploitation in next 30 days
EPSS Percentile
92.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0589 is in the 87th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (7)

redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.24.7-146.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-89.0.19.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4.7 Z StreamFixed in: kernel-0:2.6.9-78.0.29.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-164.10.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.2 Z StreamFixed in: kernel-0:2.6.18-92.1.35.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.3.Z - Server OnlyFixed in: kernel-0:2.6.18-128.12.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Virtualization for RHEL-5Fixed in: rhev-hypervisor-0:5.4-2.1.8.el5_4rhev2_1
View patch

Vendor Advisories (1)

redhatCVE-2009-4537Important

kernel: r8169 issue reported at 26c3

Dec 28, 2009

References

blog.c22.cc / 2009/12/27/26c3-cat-procsysnetipv4fuckups
Third Party Advisory
events.ccc.de / congress/2009/Fahrplan/events/3596.en.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2010-February/035159.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2010-07/msg00006.html
Mailing ListThird Party Advisory
marc.info
Mailing ListThird Party Advisory
marc.info
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
secunia.com / advisories/38031
Third Party Advisory
secunia.com / advisories/38610
Third Party Advisory
secunia.com / advisories/39742
Third Party Advisory
secunia.com / advisories/39830
Third Party Advisory
secunia.com / advisories/40645
Third Party Advisory
securitytracker.com / id
Third Party AdvisoryVDB Entry
exchange.xforce.ibmcloud.com / vulnerabilities/55647
Third Party AdvisoryVDB Entry
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7443
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9439
Third Party Advisory
rhn.redhat.com / errata/RHSA-2010-0095.html
Third Party Advisory
twitter.com / dakami/statuses/7104238406
Third Party Advisory
debian.org / security/2010/dsa-2053
Third Party Advisory
novell.com / linux/security/advisories/2010_23_kernel.html
Third Party Advisory
openwall.com / lists/oss-security/2009/12/28/1
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2009/12/29/2
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2009/12/31/1
Mailing ListThird Party Advisory
redhat.com / support/errata/RHSA-2010-0019.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0020.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0041.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0053.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0111.html
Third Party Advisory
securityfocus.com / bid/37521
Third Party AdvisoryVDB Entry
vupen.com / english/advisories/2010/1857
Third Party Advisory