Use After Free Affecting kernel-default-base package, versions <5.3.18-150200.24.139.1.150200.9.65.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Use After Free vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-SLES152-KERNELDEFAULTBASE-3178484
  • published21 Dec 2022
  • disclosed20 Dec 2022

Introduced: 20 Dec 2022

CVE-2022-3176  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 kernel-default-base to version 5.3.18-150200.24.139.1.150200.9.65.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-base package and not the kernel-default-base package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659

CVSS Scores

version 3.1