What’s Vulnerable › Vulnerabilities

CVE-2003-0643

• Severity: low (CVSS 2.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2003-07-25 · updated 2026-06-16

Description

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).

Affected products

• Linux kernel: 2.4.2, 2.4.3-pre3, 2.4.4, 2.4.5, 2.4.6, 2.4.7 (+32)

References

• http://ftp.belnet.be/linux/gentoo-portage/sys-kernel/gentoo-sources/files/gentoo-sources-2.4.CAN-2003-0643.patch
• http://gentoo.kems.net/gentoo-x86-portage/sys-kernel/gentoo-sources/ChangeLog
• http://mirror.clarkson.edu/pub/distributions/gentoo-portage/sys-kernel/wolk-sources/ChangeLog
• http://secunia.com/advisories/23265
• http://www.ultramonkey.org/bugs/cve-patch/CAN-2003-0643.patch
• http://www.ultramonkey.org/bugs/cve/CAN-2003-0643.shtml
• http://www.xerox.com/downloads/usa/en/c/cert_XRX06_004_v11.pdf
• http://ftp.belnet.be/linux/gentoo-portage/sys-kernel/gentoo-sources/files/gentoo-sources-2.4.CAN-2003-0643.patch
• http://gentoo.kems.net/gentoo-x86-portage/sys-kernel/gentoo-sources/ChangeLog
• http://mirror.clarkson.edu/pub/distributions/gentoo-portage/sys-kernel/wolk-sources/ChangeLog
• http://secunia.com/advisories/23265
• http://www.ultramonkey.org/bugs/cve-patch/CAN-2003-0643.patch

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