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


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.17% (55th percentile)

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  • Snyk ID SNYK-RHEL8-KERNELDEBUG-3544626
  • published 26 Jul 2021
  • disclosed 4 Sep 2019

How to fix?

Upgrade RHEL:8 kernel-debug 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 package and not the kernel-debug package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

An issue was discovered in the Linux kernel before 5.0.10. SMB2_read in fs/cifs/smb2pdu.c has a use-after-free. NOTE: this was not fixed correctly in 5.0.10; see the 5.0.11 ChangeLog, which documents a memory leak.

CVSS Scores

version 3.1
Expand this section

NVD

4.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    None
  • Availability (A)
    None
Expand this section

SUSE

7.8 high