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computer vulnerability bulletin CVE-2019-15920

Linux kernel: use after free via SMB2_read

Synthesis of the vulnerability

An attacker can force the usage of a freed memory area via SMB2_read() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this weakness: 1/4.
Consequences of an attack: administrator access/rights, privileged access/rights, denial of service on server, denial of service on client.
Hacker's origin: user shell.
Creation date: 25/09/2019.
Références of this bulletin: CERTFR-2019-AVI-455, CERTFR-2019-AVI-502, CERTFR-2019-AVI-503, CVE-2019-15920, openSUSE-SU-2019:2173-1, openSUSE-SU-2019:2181-1, SUSE-SU-2019:2412-1, SUSE-SU-2019:2424-1, SUSE-SU-2019:2648-1, SUSE-SU-2019:2651-1, SUSE-SU-2019:2658-1, VIGILANCE-VUL-30408.

Description of the vulnerability

An attacker can force the usage of a freed memory area via SMB2_read() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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