{"id":"CVE-2025-3031","title":"An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function","summary":"An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-200"],"vendor":"mozilla","product":"firefox","affected":["firefox < 137.0","thunderbird < 137.0"],"patched":["firefox 137.0","thunderbird 137.0"],"published":"2025-04-01","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-3031","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1947141","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-20/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-23/","label":"security@mozilla.org"}],"tags":["nvd"],"epss":0.00291,"epssPercentile":0.19594,"ingestedAt":"2026-09-30T18:17:24.431Z","slug":"CVE-2025-3031","body":"## Overview\n\nAn attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137.\n\n## Affected\n\n- `firefox < 137.0`\n- `thunderbird < 137.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 137.0`\n- `thunderbird 137.0`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}