Vigil@nce - Linux kernel: NULL pointer dereference via serial8250_start_tx
December 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, SUSE Linux Enterprise
Desktop, SLES.
Severity: 1/4.
Consequences: denial of service on server.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 07/12/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force a NULL pointer to be dereferenced via
serial8250_start_tx() of the Linux kernel, in order to trigger a
denial of service.
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