Is CVE-2009-4537 being actively exploited?

CVE-2009-4537 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-4537?

CVE-2009-4537 has a CVSS 2.0 base score of 7.8 (HIGH).

CVE-2009-4537

HIGH · CVSS 7.8EPSS 5.9%EU EUVD

drivers/net/r8169.c in the r8169 driver in the Linux kernel 2.6.32.3 and earlier does not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to (1) cause a denial of service (temporary network outage) via a packet with a crafted size, in conjunction with certain packets containing A characters and certain packets containing E characters; or (2) cause a denial of service (system crash) via a packet with a crafted size, in conjunction with certain packets containing '\0' characters, related to the value of the status register and erroneous behavior associated with the RxMaxSize register. NOTE: this vulnerability exists because of an incorrect fix for CVE-2009-1389.

Key facts

CVSS score: 7.8 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness (CWE): CWE-20
EPSS score: 5.9% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-4503)
Published: January 12, 2010
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-4503 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

debian / debian linux
linux / linux kernel

References

http://blog.c22.cc/2009/12/27/26c3-cat-procsysnetipv4fuckups/(Third Party Advisory)
http://events.ccc.de/congress/2009/Fahrplan/events/3596.en.html(Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035159.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2010-07/msg00006.html(Mailing List, Third Party Advisory)
http://marc.info/?l=linux-netdev&m=126202972828626&w=2(Mailing List, Third Party Advisory)
http://marc.info/?t=126202986900002&r=1&w=2(Mailing List, Third Party Advisory)
http://secunia.com/advisories/38031(Third Party Advisory)
http://secunia.com/advisories/38610(Third Party Advisory)
http://secunia.com/advisories/39742(Third Party Advisory)
http://secunia.com/advisories/39830(Third Party Advisory)
http://secunia.com/advisories/40645(Third Party Advisory)
http://securitytracker.com/id?1023419(Third Party Advisory, VDB Entry)
http://twitter.com/dakami/statuses/7104238406(Third Party Advisory)
http://www.debian.org/security/2010/dsa-2053(Third Party Advisory)
http://www.novell.com/linux/security/advisories/2010_23_kernel.html(Third Party Advisory)
http://www.openwall.com/lists/oss-security/2009/12/28/1(Mailing List, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2009/12/29/2(Mailing List, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2009/12/31/1(Mailing List, Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2010-0019.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2010-0020.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2010-0041.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2010-0053.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2010-0111.html(Third Party Advisory)
http://www.securityfocus.com/bid/37521(Third Party Advisory, VDB Entry)
http://www.vupen.com/english/advisories/2010/1857(Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=550907(Issue Tracking, Third Party Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/55647(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7443(Third Party Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9439(Third Party Advisory)
https://rhn.redhat.com/errata/RHSA-2010-0095.html(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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