Use After Free Affecting firefox package, versions <0:78.5.0-1.el8_0


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.36% (74th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-4382499
  • published26 Jul 2021
  • disclosed17 Nov 2020

Introduced: 17 Nov 2020

CVE-2020-26959  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:78.5.0-1.el8_0 or higher.
This issue was patched in RHSA-2020:5314.

NVD Description

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

During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS Scores

version 3.1