PT-2025-14109 · Mozilla+4 · Thunderbird+5

Published 2025-04-01 · Updated 2026-04-14 · CVE-2025-3034

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 137 Thunderbird versions prior to 137

Description The issue concerns memory safety bugs that were present in certain versions of Firefox and Thunderbird. Some of these bugs showed evidence of memory corruption, and it is presumed that with sufficient effort, some of them could have been exploited to run arbitrary code.

Recommendations For Firefox versions prior to 137, update to version 137 or later to resolve the issue. For Thunderbird versions prior to 137, update to version 137 or later to resolve the issue.

Fix

Memory Corruption

Buffer Overflow

Weakness Enumeration

CWE-787

CWE-403

CWE-119

Related Identifiers

ALT-PU-2025-11100

ALT-PU-2025-14599

ALT-PU-2025-5137

ALT-PU-2025-6353

ALT-PU-2025-7695

ALT-PU-2025-7697

AZL-59523

AZL-61807

BDU:2025-04985

BDU:2025-07527

CVE-2025-3034

OPENSUSE-SU-2025:14971-1

USN-7991-1

Affected Products

Alt Linux

Astra Linux

Firefox

Linuxmint

Thunderbird

Ubuntu

References · 151

• https://ubuntu.com/security/CVE-2025-13015 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-11711 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0887 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0891 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-14328 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-8039 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-11715 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-8038 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2025-20/#CVE-2025-3034 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-6434 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-0243 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-6435 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-07527 · Security Note
• https://bdu.fstec.ru/vul/2025-04985 · Security Note
• https://ubuntu.com/security/CVE-2026-0882 · Vendor Advisory