{"id":"CVE-2023-5171","state":"PUBLISHED","title":"During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable cra","description":"During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.","publishedAt":"2023-09-27T14:13:12.642Z","updatedAt":"2025-02-13T17:19:49.191Z","severity":null,"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Firefox ESR","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"118","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"115.3","versionType":"custom"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"unspecified","status":"affected","lessThan":"115.3","versionType":"custom"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1851599","https://www.mozilla.org/security/advisories/mfsa2023-41/","https://www.mozilla.org/security/advisories/mfsa2023-42/","https://www.mozilla.org/security/advisories/mfsa2023-43/","https://www.debian.org/security/2023/dsa-5506","https://lists.debian.org/debian-lts-announce/2023/09/msg00034.html","https://www.debian.org/security/2023/dsa-5513","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AY642Z6JZODQJE7Z62CFREVUHEGCXGPD/","https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:42.242Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/5xxx/CVE-2023-5171.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-5171","state":"PUBLISHED","datePublished":"2023-09-27T14:13:12.642Z","dateUpdated":"2025-02-13T17:19:49.191Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2023-09-25T15:03:42.289Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. 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