Out-of-bounds Write Affecting firefox-debuginfo package, versions <0:140.9.1-1.amzn2023.0.1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.33% (25th percentile)

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  • Snyk IDSNYK-AMZN2023-FIREFOXDEBUGINFO-16352017
  • published3 May 2026
  • disclosed7 Apr 2026

Introduced: 7 Apr 2026

CVE-2026-5734  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 firefox-debuginfo to version 0:140.9.1-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1621.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-debuginfo package and not the firefox-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.

CVSS Base Scores

version 3.1