CVE-2025-4093

Published: Apr 29, 2025Modified: Apr 13, 2026

8.1

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.2 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.

Affected (2)

Products: Mozilla: Firefox, Thunderbird

2 products

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 128.10
Mozilla Thunderbird	Before 128.10.0

Related CWEs

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

References (4)

https://bugzilla.mozilla.org/show_bug.cgi?id=1894100

Source: security@mozilla.org

Permissions Required

https://www.mozilla.org/security/advisories/mfsa2025-29/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-32/

Source: security@mozilla.org

Vendor Advisory

https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.