Vigil@nce - Linux kernel: use after free via nbd_queue_rq
March 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
– Impacted products: Linux, openSUSE Leap, SUSE Linux Enterprise
Desktop, SLES, Ubuntu.
– Severity: 2/4.
– Consequences: administrator access/rights, denial of service on
server.
– Provenance: user shell.
– Confidence: confirmed by the editor (5/5).
– Creation date: 28/01/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via
nbd_queue_rq() 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-nbd-queue-rq-34429