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Use After Free Affecting kernel-debug-modules package, versions <0:4.18.0-147.el8

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.11% (46th percentile)

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  • Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-1390057
  • published 26 Jul 2021
  • disclosed 4 Jul 2019
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Introduced: 4 Jul 2019

CVE-2019-13233 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-147.el8 or higher.
This issue was patched in RHSA-2019:3517.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

In arch/x86/lib/insn-eval.c in the Linux kernel before 5.1.9, there is a use-after-free for access to an LDT entry because of a race condition between modify_ldt() and a #BR exception for an MPX bounds violation.

References