Vigil@nce - Linux kernel: use after free via open may_create_in_sticky
March 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerabilities-watch-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: Fedora, Linux, openSUSE Leap, SUSE Linux
Enterprise Desktop, SLES.
Severity: 2/4.
Consequences: administrator access/rights, denial of service on
server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 29/01/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via open
may_create_in_sticky() of the Linux kernel, in order to trigger a
denial of service, and possibly to run code.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Linux-kernel-use-after-free-via-open-may-create-in-sticky-31455