CVE-2025-8027

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-8027
On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability affects Firefox < 141, Firefox ESR < 115.26, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1968423 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-56/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-57/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-58/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-59/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-61/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-62/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-63/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
History

28 Jul 2025, 18:30

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1968423 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1968423 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-56/ - () https://www.mozilla.org/security/advisories/mfsa2025-56/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-57/ - () https://www.mozilla.org/security/advisories/mfsa2025-57/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-58/ - () https://www.mozilla.org/security/advisories/mfsa2025-58/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-59/ - () https://www.mozilla.org/security/advisories/mfsa2025-59/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-61/ - () https://www.mozilla.org/security/advisories/mfsa2025-61/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-62/ - () https://www.mozilla.org/security/advisories/mfsa2025-62/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-63/ - () https://www.mozilla.org/security/advisories/mfsa2025-63/ - Vendor Advisory
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

23 Jul 2025, 14:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
CWE CWE-457
Summary
  • (es) En plataformas de 64 bits, IonMonkey-JIT solo escribía 32 bits del espacio de valor de retorno de 64 bits en la pila. Sin embargo, Baseline-JIT leía los 64 bits completos. Esta vulnerabilidad afecta a Firefox &lt; 141, Firefox ESR &lt; 115.26, Firefox ESR &lt; 128.13, Firefox ESR &lt; 140.1, Thunderbird &lt; 141, Thunderbird &lt; 128.13 y Thunderbird &lt; 140.1.

22 Jul 2025, 21:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-22 21:15

Updated : 2025-07-28 18:30

NVD link : CVE-2025-8027

Mitre link : CVE-2025-8027

CVE.ORG link : CVE-2025-8027

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-457

Use of Uninitialized Variable