CoreCVE
Back

HIGH

Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10

Published Apr 29, 2025

Description

Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. 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 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.

Affected products

Remediation

Red Hat statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

Metrics

Weaknesses (2)

CWE-119

Buffer Overflow

CWE-120

Classic Buffer Overflow

References (10)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mozilla
Published Apr 29, 2025
Updated Apr 13, 2026
Reserved Apr 29, 2025
Link CVE-2025-4091
CISA Vulnrichment
Updated Apr 29, 2025
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2025-4091
Red Hat
Severity Moderate
Public date Apr 29, 2025
Links CVE-2025-4091 - Bugzilla