Vigil@nce - Linux kernel: NULL pointer dereference via ext4_empty_dir
December 2019 by Marc Jacob
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: Linux.
Consequences: denial of service on server.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 21/11/2019.
DESCRIPTION OF THE VULNERABILITY
An attacker can force a NULL pointer to be dereferenced via ext4_empty_dir() of the Linux kernel, in order to trigger a denial of service.
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