CVE-2005-3806

6.6 MEDIUM 0.4% exploit odds Fix listed

What it is

The IPv6 flow label handling code (ip6_flowlabel.c) in Linux kernels 2.4 up to 2.4.32 and 2.6 before 2.6.14 modifies the wrong variable in certain circumstances, which allows local users to corrupt kernel memory or cause a denial of service (crash) by triggering a free of non-allocated memory.

At a glance

Exploitability: Can be exploited locally on the machine without logging in. High risk of data tampering, service disruption.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2005-11-25 21:03 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:17 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 6.6 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2005-11-25 21:03 UTC
Last modified: 2026-06-16 22:17 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-399
Record status: Modified

Affected

Linux Kernel 2.4.0
Linux Kernel 2.4.1
Linux Kernel 2.4.2
Linux Kernel 2.4.3
Linux Kernel 2.4.10
Linux Kernel 2.4.11
Linux Kernel 2.4.12
Linux Kernel 2.4.13

Attack profile CVSS 2.0 · 6.6

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

Raw vector

AV:L/AC:L/Au:N/C:N/I:C/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-2005-3806.md and follow it. Check whether this project is affected by CVE-2005-3806. 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