CVE-2009-4026

7.8 HIGH 3% exploit odds Fix listed

What it is

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."

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 3.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2009-12-02 16:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:12 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.1% in the next 30 days (EPSS).
Severity: 7.8 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2009-12-02 16:30 UTC
Last modified: 2026-06-16 23:12 UTC
Exploit probability: 3.1% · EPSS, next 30 days
Record status: Modified

Affected

Linux Kernel ≤ 2.6.32
Linux Kernel 2.6.0
Linux Kernel 2.6.1
Linux Kernel 2.6.2
Linux Kernel 2.6.3
Linux Kernel 2.6.4
Linux Kernel 2.6.5
Linux Kernel 2.6.6

Attack profile CVSS 2.0 · 7.8

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-4026.md and follow it. Check whether this project is affected by CVE-2009-4026. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record