Vigil@nce - Linux kernel: use after free via smp_task_timedout
September 2019 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerability-database-and-alert
SYNTHESIS OF THE VULNERABILITY
– Impacted products: Debian, Linux, openSUSE Leap, RSA
Authentication Manager, 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: 12/07/2019.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via
smp_task_timedout() 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-smp-task-timedout-29763