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CVE-2025-8027

MEDIUM

6.5

Description

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published7/22/2025

Last Modified11/3/2025

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefoxmozilla:thunderbird

Weaknesses (CWE)

CWE-457

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1968423(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-56/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-57/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-58/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-59/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-61/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-62/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2025-63/(security@mozilla.org)

https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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