CVE-2009-4026 Denial of service in n/a

What is CVE-2009-4026?

CVE-2009-4026 is a high-severity denial of service vulnerability in Linux kernel, published on 2 Dec 2009. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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."

Which versions are affected by CVE-2009-4026?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2009-4026?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2009-4026 being exploited?

There is no known exploitation of CVE-2009-4026 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3rff-g889-h6g3.