CVE-2007-3642

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-07-10 · updated 2026-06-16
Weakness: CWE-189

Description

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 kernel: through 2.6.20.14; 2.6.0, 2.6.1, 2.6.1-rc1, 2.6.1-rc2, 2.6.1-rc3, 2.6.2 (+234)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=25845b5155b55cd77e42655ec24161ba3feffa47
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.15
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.21.6
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22
http://osvdb.org/37117
http://secunia.com/advisories/25955
http://secunia.com/advisories/26450
http://secunia.com/advisories/27212
http://www.debian.org/security/2007/dsa-1356
http://www.mandriva.com/security/advisories?name=MDKSA-2007:195
http://www.securityfocus.com/bid/24818
http://www.ubuntu.com/usn/usn-510-1

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