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vulnerability note CVE-2018-12232

Linux kernel: NULL pointer dereference via sock_close/sockfs_setattr

Synthesis of the vulnerability

An attacker can force a NULL pointer to be dereferenced via sock_close/sockfs_setattr of the Linux kernel, in order to trigger a denial of service.
Impacted products: Fedora, Linux, openSUSE Leap, RHEL, Ubuntu.
Severity: 1/4.
Consequences: denial of service on server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 13/06/2018.
Identifiers: CERTFR-2018-AVI-408, CERTFR-2018-AVI-413, CVE-2018-12232, FEDORA-2018-bb7aab12cb, openSUSE-SU-2019:0065-1, RHSA-2018:2948-01, USN-3752-1, USN-3752-2, USN-3752-3, VIGILANCE-VUL-26414.

Description of the vulnerability

The Noyau Linux product offers a web service.

However, it does not check if a pointer is NULL, before using it.

An attacker can therefore force a NULL pointer to be dereferenced via sock_close/sockfs_setattr of the Linux kernel, in order to trigger a denial of service.
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