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Vulnerability record · CVE-2004-0626 · published 6 December 2004

CVE-2004-0626: Conectiva linux vulnerability

Conectiva · Linux

The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules, allows remote attackers to cause a denial of service (CPU consumption by infinite loop) via a large option length that produces a negative integer after a casting operation to the char type.

5.0 CVSS 2.0 Medium EPSS 2.8% · top 14.2%
5.0CVSS 2.0 base score
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules, allows remote attackers to cause a denial of service (CPU consumption by infinite loop) via a large option length that produces a negative integer after a casting operation to the char type.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000852 PatchVendor Advisory
http://lwn.net/Articles/91964/ PatchVendor Advisory
http://marc.info/?l=bugtraq&m=108861141304495&w=2
http://www.gentoo.org/security/en/glsa/glsa-200407-12.xml PatchVendor Advisory
http://www.novell.com/linux/security/advisories/2004_20_kernel.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/16554
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000852 PatchVendor Advisory
http://lwn.net/Articles/91964/ PatchVendor Advisory
http://marc.info/?l=bugtraq&m=108861141304495&w=2
http://www.gentoo.org/security/en/glsa/glsa-200407-12.xml PatchVendor Advisory
http://www.novell.com/linux/security/advisories/2004_20_kernel.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/16554

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Source: NIST National Vulnerability Database (record CVE-2004-0626), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.