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.
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 |
| https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html |
Configurations
Configuration 1 (hide)
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History
03 Nov 2025, 20:19
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Information
Published : 2025-07-22 21:15
Updated : 2025-11-03 20:19
NVD link : CVE-2025-8027
Mitre link : CVE-2025-8027
CVE.ORG link : CVE-2025-8027
JSON object : View
Products Affected
mozilla
- thunderbird
- firefox
CWE
CWE-457
Use of Uninitialized Variable
