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HIGH

Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142

Published Aug 19, 2025

Description

Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. 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 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

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 (1)

CWE-119

Buffer Overflow

References (16)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mozilla
Published Aug 19, 2025
Updated Apr 13, 2026
Reserved Aug 19, 2025
Link CVE-2025-9185
CISA Vulnrichment
Updated Aug 20, 2025
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2025-9185
Red Hat
Severity Important
Public date Aug 19, 2025
Links CVE-2025-9185 - Bugzilla