Vigil@nce - Linux kernel: use after free via vgacon_invert_region
April 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: Linux, openSUSE Leap, Slackware, SLES.
Severity: 2/4.
Consequences: administrator access/rights, denial of service on
server.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 06/02/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via
vgacon_invert_region() 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-vgacon-invert-region-31538