CVE-2025-5269

CVE Details

Release Date:	2025-05-27
Impact:	Moderate	What is this?

Description

Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. 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 affects Firefox ESR < 128.11 and Thunderbird < 128.11.

See more information about CVE-2025-5269 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	6.1
Vector String:	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Version:	3.1
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	Required
Scope:	Changed
Confidentiality Impact:	Low
Integrity Impact:	Low
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (firefox)	ELSA-2025-9074	2025-06-23
Oracle Linux version 8 (firefox)	ELSA-2025-8308	2025-05-29
Oracle Linux version 8 (thunderbird)	ELSA-2025-8756	2025-06-10
Oracle Linux version 9 (firefox)	ELSA-2025-8293	2025-05-29
Oracle Linux version 9 (thunderbird)	ELSA-2025-8607	2025-06-06