{"id":"CVE-2025-0238","title":"Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash","summary":"Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 1…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-416"],"vendor":"mozilla","product":"firefox","affected":["firefox < 115.19.0","firefox < 134.0","firefox >= 116.0, < 128.6.0","thunderbird < 128.6","thunderbird >= 129.0, < 134.0"],"patched":["firefox 128.6.0","thunderbird 134.0"],"published":"2025-01-07","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-0238","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1915535","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-01/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-02/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-03/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-04/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-05/","label":"security@mozilla.org"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00811,"epssPercentile":0.55373,"ingestedAt":"2026-09-30T18:17:24.426Z","slug":"CVE-2025-0238","body":"## Overview\n\nAssuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 128.6.\n\n## Affected\n\n- `firefox < 115.19.0`\n- `firefox < 134.0`\n- `firefox >= 116.0, < 128.6.0`\n- `thunderbird < 128.6`\n- `thunderbird >= 129.0, < 134.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 128.6.0`\n- `thunderbird 134.0`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}