Use After Free Affecting firefox package, versions <0:78.6.0-1.el8_3


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.61% (80th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-3917315
  • published26 Jul 2021
  • disclosed15 Dec 2020

Introduced: 15 Dec 2020

CVE-2020-26974  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:78.6.0-1.el8_3 or higher.
This issue was patched in RHSA-2020:5562.

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.

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVSS Scores

version 3.1