CVE-2005-3806

CVE-2005-3806 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Description

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.

Frequently asked questions

What is CVE-2005-3806?
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.
How severe is CVE-2005-3806?
CVE-2005-3806 has a CVSS 2.0 base score of 6.6, rated medium severity.
Is CVE-2005-3806 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-3806?
CVE-2005-3806 primarily affects Linux Linux Kernel. In total, 106 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-3806?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-3806 published?
CVE-2005-3806 was published on 2005-11-25 and last updated on 2026-06-16.

References

Affected products (106)

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