CVE-2006-4623 Denial of service in n/a

What is CVE-2006-4623?

CVE-2006-4623 is a high-severity denial of service vulnerability in Linux kernel, published on 11 Sep 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Unidirectional Lightweight Encapsulation (ULE) decapsulation component in dvb-core/dvb_net.c in the dvb driver in the Linux kernel 2.6.17.8 allows remote attackers to cause a denial of service (crash) via an SNDU length of 0 in a ULE packet.

Which versions are affected by CVE-2006-4623?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2006-4623?

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-2006-4623 being exploited?

There is no known exploitation of CVE-2006-4623 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-m979-hwfc-hpv2.