CVE-2005-3809 Null dereference in n/a

What is CVE-2005-3809?

CVE-2005-3809 is a high-severity vulnerability in Linux kernel, published on 25 Nov 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The nfattr_to_tcp function in ip_conntrack_proto_tcp.c in ctnetlink in Linux kernel 2.6.14 up to 2.6.14.3 allows attackers to cause a denial of service (kernel oops) via an update message without private protocol information, which triggers a null dereference.

Which versions are affected by CVE-2005-3809?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2005-3809?

No fix has been published for CVE-2005-3809 yet. Limit exposure of the affected software until one is available.

Is CVE-2005-3809 being exploited?

There is no known exploitation of CVE-2005-3809 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-f47f-7prx-x9jv.