Use After Free Affecting kernel-zfcpdump-devel package, versions <0:4.18.0-240.el8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.08% (35th percentile)

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  • Snyk ID SNYK-RHEL8-KERNELZFCPDUMPDEVEL-3798320
  • published 26 Jul 2021
  • disclosed 30 Jan 2020

How to fix?

Upgrade RHEL:8 kernel-zfcpdump-devel to version 0:4.18.0-240.el8 or higher.
This issue was patched in RHSA-2020:4431.

NVD Description

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

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the n_tty_receive_buf_common function in drivers/tty/n_tty.c.

CVSS Scores

version 3.1
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NVD

7.1 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    High
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Red Hat

7.1 high
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SUSE

6.1 medium