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vulnerability CVE-2019-12456

Linux kernel: use after free via _ctl_ioctl_main

Synthesis of the vulnerability

An attacker can force the usage of a freed memory area via _ctl_ioctl_main() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Fedora, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this threat: 2/4.
Consequences of a hack: administrator access/rights, denial of service on server, denial of service on service.
Pirate's origin: user shell.
Creation date: 03/06/2019.
Références of this weakness: CERTFR-2019-AVI-330, CERTFR-2019-AVI-337, CERTFR-2019-AVI-346, CVE-2019-12456, FEDORA-2019-83858fc57b, FEDORA-2019-c03eda3cc6, openSUSE-SU-2019:1570-1, openSUSE-SU-2019:1571-1, openSUSE-SU-2019:1579-1, SUSE-SU-2019:1823-1, SUSE-SU-2019:1823-2, SUSE-SU-2019:1851-1, SUSE-SU-2019:1852-1, SUSE-SU-2019:1855-1, SUSE-SU-2019:1870-1, VIGILANCE-VUL-29450.

Description of the vulnerability

An attacker can force the usage of a freed memory area via _ctl_ioctl_main() of ...
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