CVE-2025-8027
MEDIUM severity · CVSS 6.5 · CWE-457
6.5CVSS MEDIUM
Summary
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 was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2025-56/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-57/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-58/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-59/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-61/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-62/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-63/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1968423