Back
CVE-2004-0626
The tcp_find_option function of the netfilter subsystem in Linux kernel 2.6, when using iptables and TCP options rules, allows remote…
- 5.0MediumCVSS base score
- 2.8%Exploitation in 30 daysEPSS · top 14% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
- 6 days later
· 6 days later
Published
- 20 years later
· 20 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 2.8% · top 14% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
6
- FEDORA-2004-202 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- GLSA-200407-12 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 20040630 Remote DoS vulnerability in Linux kernel 2.6.x (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- linux-tcpfindoption-dos(16554) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- CLA-2004:852 (opens in a new tab)vendor-advisoryx_refsource_CONECTIVAx_transferred
- SUSE-SA:2004:020 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2004-0625 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2004-0626)Record last updated .