{"id":"CVE-2004-0626","aliases":["EUVD-2004-0625","GHSA-hvfj-m7r2-j689"],"status":"published","title":"The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables...","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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02761,"percentile":0.86366,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2004-07-06T04:00:00Z","modified":"2026-06-16T22:06:01Z","products":[{"vendor":"conectiva","product":"linux"},{"vendor":"gentoo","product":"linux"},{"vendor":"linux","product":"linux_kernel"},{"vendor":"suse","product":"suse_linux"}],"references":[{"url":"http://lwn.net/Articles/91964/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","Patch","Vendor Advisory"]},{"url":"http://www.gentoo.org/security/en/glsa/glsa-200407-12.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Patch","Vendor Advisory"]},{"url":"http://marc.info/?l=bugtraq\u0026m=108861141304495\u0026w=2","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/16554","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://distro.conectiva.com.br/atualizacoes/?id=a\u0026anuncio=000852","tags":["vendor-advisory","x_refsource_CONECTIVA","x_transferred","Patch","Vendor Advisory"]},{"url":"http://www.novell.com/linux/security/advisories/2004_20_kernel.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2004-0626"},{"url":"http://lwn.net/Articles/91964"},{"url":"https://github.com/advisories/GHSA-hvfj-m7r2-j689"}],"sources":{"cve":[{"id":"CVE-2004-0626","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.","status":"published","published":"2004-07-06T04:00:00Z","modified":"2024-08-08T00:24:26.885Z","updated_at":"2026-11-02T14:34:54.398187Z"}],"euvd":[{"id":"EUVD-2004-0625","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.","status":"published","published":"2004-07-06T04:00:00Z","modified":"2024-08-08T00:24:26Z","updated_at":"2026-11-03T01:15:18.677356Z"}],"ghsa":[{"id":"GHSA-hvfj-m7r2-j689","title":"The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables...","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.","status":"published","published":"2022-04-29T02:58:03Z","modified":"2025-04-03T04:03:33Z","updated_at":"2026-11-02T15:00:39.470148Z"}],"nvd":[{"id":"CVE-2004-0626","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.","status":"published","published":"2004-12-06T05:00:00Z","modified":"2026-06-16T22:06:01.117Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:51.985436Z"}]}}