PT-2025-33873 · Mozilla+2 · Firefox+3

Andy Leiserson + 2 · Published 2025-08-19 · Updated 2025-10-27 · CVE-2025-9187

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: Firefox versions prior to 142 Thunderbird versions prior to 142

Description: Memory safety bugs are present in Firefox 141 and Thunderbird 141. 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: Update Firefox to version 142 or later. Update Thunderbird to version 142 or later.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

ALT-PU-2025-12559

ALT-PU-2025-12562

BDU:2025-10503

CVE-2025-9187

OPENSUSE-SU-2025:15516-1

SUSE-SU-2025:03008-1

SUSE-SU-2025:03009-1

SUSE-SU-2025:3759-1

SUSE-SU-2025:3760-1

SUSE-SU-2025:3804-1

SUSE-SU-2025_03008-1

SUSE-SU-2025_03009-1

SUSE-SU-2025_3759-1

SUSE-SU-2025_3760-1

SUSE-SU-2025_3804-1

Affected Products

Alt Linux

Firefox

Suse

Thunderbird

References · 39

• https://mozilla.org/en-US/security/advisories/mfsa2025-64/#CVE-2025-9187 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2025-70 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-9187 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:3804-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-9187 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-9187 · Security Note
• https://mozilla.org/security/advisories/mfsa2025-64 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15516-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:3760-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-9187 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03009-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-9187 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-10503 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:03008-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:3759-1 · Vendor Advisory