CVE-2025-8027
JavaScript engine only wrote partial return value to stack
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.5EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
22 Jul 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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Talk to TrueHacking →References
https://bugzilla.mozilla.org/show_bug.cgi?id=1968423https://lists.debian.org/debian-lts-announce/2025/07/msg00016.htmlhttps://www.mozilla.org/security/advisories/mfsa2025-56/https://www.mozilla.org/security/advisories/mfsa2025-57/https://www.mozilla.org/security/advisories/mfsa2025-58/https://www.mozilla.org/security/advisories/mfsa2025-59/https://www.mozilla.org/security/advisories/mfsa2025-61/https://www.mozilla.org/security/advisories/mfsa2025-62/https://www.mozilla.org/security/advisories/mfsa2025-63/