CVE-2007-3642: Linux Kernel

High severity, CVSS 7.8. EPSS: 3.9% chance of exploitation in the next 30 days.

The decode_choice function in net/netfilter/nf_conntrack_h323_asn1.c in the Linux kernel before 2.6.20.15, 2.6.21.x before 2.6.21.6, and before 2.6.22 allows remote attackers to cause a denial of service (crash) via an encoded, out-of-range index value for a choice field, which triggers a NULL pointer dereference.

Affected products

• Linux Linux Kernel: up to and including 2.6.20.14; version 2.6.0 only; version 2.6.1 only; version 2.6.2 only; version 2.6.3 only; version 2.6.4 only; …

Published 2007-07-10. Last modified 2026-06-16.