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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


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