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Vulnerability record · CVE-2003-0244 · published 27 May 2003

CVE-2003-0244: Linux kernel vulnerability

Linux · Linux Kernel

The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CPU consumption) via packets with forged source addresses that cause a large number of hash table collisions.

5.0 CVSS 2.0 Medium EPSS 7.7% · top 5.6%
5.0CVSS 2.0 base score
7.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
38References
16 Jun 2026Last modified by NVD

Description

The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CPU consumption) via packets with forged source addresses that cause a large number of hash table collisions.

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

Affected products

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

References

LinkTags
http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0073.html
http://marc.info/?l=bugtraq&m=105301461726555&w=2
http://marc.info/?l=bugtraq&m=105595901923063&w=2
http://marc.info/?l=linux-kernel&m=104956079213417
http://www.debian.org/security/2003/dsa-311 PatchVendor Advisory
http://www.debian.org/security/2003/dsa-312
http://www.debian.org/security/2003/dsa-332
http://www.debian.org/security/2003/dsa-336
http://www.debian.org/security/2004/dsa-442
http://www.enyo.de/fw/security/notes/linux-dst-cache-dos.html
http://www.mandriva.com/security/advisories?name=MDKSA-2003:066
http://www.mandriva.com/security/advisories?name=MDKSA-2003:074
http://www.redhat.com/support/errata/RHSA-2003-145.html PatchVendor Advisory
http://www.redhat.com/support/errata/RHSA-2003-147.html
http://www.redhat.com/support/errata/RHSA-2003-172.html
http://www.secunia.com/advisories/8786/
http://www.securityfocus.com/bid/7601
https://exchange.xforce.ibmcloud.com/vulnerabilities/15382
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A261
http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0073.html
http://marc.info/?l=bugtraq&m=105301461726555&w=2
http://marc.info/?l=bugtraq&m=105595901923063&w=2
http://marc.info/?l=linux-kernel&m=104956079213417
http://www.debian.org/security/2003/dsa-311 PatchVendor Advisory
http://www.debian.org/security/2003/dsa-312
http://www.debian.org/security/2003/dsa-332
http://www.debian.org/security/2003/dsa-336
http://www.debian.org/security/2004/dsa-442
http://www.enyo.de/fw/security/notes/linux-dst-cache-dos.html
http://www.mandriva.com/security/advisories?name=MDKSA-2003:066
http://www.mandriva.com/security/advisories?name=MDKSA-2003:074
http://www.redhat.com/support/errata/RHSA-2003-145.html PatchVendor Advisory
http://www.redhat.com/support/errata/RHSA-2003-147.html
http://www.redhat.com/support/errata/RHSA-2003-172.html
http://www.secunia.com/advisories/8786/
http://www.securityfocus.com/bid/7601
https://exchange.xforce.ibmcloud.com/vulnerabilities/15382
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A261

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Source: NIST National Vulnerability Database (record CVE-2003-0244), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.