CVE-2003-0643

2.1 LOW 0.4% exploit odds No fix listed

What it is

Integer signedness error in the Linux Socket Filter implementation (filter.c) in Linux 2.4.3-pre3 to 2.4.22-pre10 allows attackers to cause a denial of service (crash).

At a glance

Exploitability: Can be exploited locally on the machine without logging in. Limited direct impact.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2003-07-25 04:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:02 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 2.1 LOW (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2003-07-25 04:00 UTC
Last modified: 2026-06-16 22:02 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Record status: Modified

Affected

Linux Kernel 2.4.2
Linux Kernel 2.4.3
Linux Kernel 2.4.4
Linux Kernel 2.4.5
Linux Kernel 2.4.6
Linux Kernel 2.4.7
Linux Kernel 2.4.8
Linux Kernel 2.4.9

Attack profile CVSS 2.0 · 2.1

Attack vector: Local
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Partial

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2003-0643.md and follow it. Check whether this project is affected by CVE-2003-0643. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record