What is CVE-2009-4026?

CVE-2009-4026 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10. CVE-2009-4026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2009-4026?

CVE-2009-4026 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is AV:N/AC:L/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2009-4026?

No patch is currently available for CVE-2009-4026. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2009-4026 actively exploited?

CVE-2009-4026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2009-4026

High

The mac80211 subsystem in the Linux kernel before 2.6.32-rc8-next-20091201 allows remote attackers to cause a denial of service (panic) via a crafted Delete Block ACK (aka DELBA) packet, related to an erroneous "code shuffling patch."

Package Linux Kernel

Published 2009-12-02

Last modified 2026-04-23

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

7.8

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

Vector string

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

References

The following references provide additional information about CVE-2009-4026 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Lists
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
Secunia
http://secunia.com/advisories/38017
Openwall
http://www.openwall.com/lists/oss-security/2009/12/01/2
Securityfocus
http://www.securityfocus.com/bid/37170
Ubuntu Security
http://www.ubuntu.com/usn/usn-864-1
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=541149
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=827d42c9ac91ddd728e4f4a31fefb906ef2ceff7
Patch
Kernel patch commit
http://www.kernel.org/pub/linux/kernel/v2.6/next/patch-v2.6.32-rc8-next-20091201.gz
Patch

Details

CVE ID CVE-2009-4026

Severity High

CVSS score 7.8 / 10

CVSS version 2.0

Published 2009-12-02

Modified 2026-04-23

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2009-4026?

CVE-2009-4026 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2009-4026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2009-4026?

CVE-2009-4026 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 2.0). The vector string is AV:N/AC:L/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2009-4026?

No patch is currently available for CVE-2009-4026. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2009-4026 actively exploited?

No — CVE-2009-4026 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.