{"id":"DEBIAN-CVE-2025-1012","details":"A race during concurrent delazification could have led to a use-after-free. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.","modified":"2026-09-01T16:06:08.399181959Z","published":"2025-02-04T14:15:32Z","upstream":["CVE-2025-1012"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-1012"}],"affected":[{"package":{"name":"firefox-esr","ecosystem":"Debian:12","purl":"pkg:deb/debian/firefox-esr?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"128.7.0esr-1~deb12u1"}]}],"versions":["102.11.0esr-1","102.12.0esr-1","102.12.0esr-1~deb10u1","102.12.0esr-1~deb11u1","102.12.0esr-1~deb12u1","102.13.0esr-1","102.13.0esr-1~deb10u1","102.13.0esr-1~deb11u1","102.13.0esr-1~deb12u1","102.14.0esr-1~deb10u1","102.14.0esr-1~deb11u1","102.14.0esr-1~deb12u1","102.15.0esr-1~deb10u1","102.15.0esr-1~deb11u1","102.15.0esr-1~deb12u1","102.15.1esr-1~deb10u1","102.15.1esr-1~deb11u1","102.15.1esr-1~deb12u1","115.0.2esr-1","115.1.0esr-1","115.10.0esr-1","115.10.0esr-1~deb10u1","115.10.0esr-1~deb11u1","115.10.0esr-1~deb12u1","115.11.0esr-1","115.11.0esr-1~deb10u1","115.11.0esr-1~deb11u1","115.11.0esr-1~deb12u1","115.12.0esr-1","115.12.0esr-1~deb10u1","115.12.0esr-1~deb11u1","115.12.0esr-1~deb12u1","115.13.0esr-1","115.13.0esr-1~deb11u1","115.13.0esr-1~deb12u1","115.13.0esr-2","115.14.0esr-1","115.14.0esr-1~deb11u1","115.14.0esr-1~deb12u1","115.15.0esr-1","115.15.0esr-1~deb11u1","115.15.0esr-1~deb12u1","115.2.0esr-1","115.2.1esr-1","115.3.0esr-1","115.3.0esr-1~deb10u1","115.3.0esr-1~deb11u1","115.3.0esr-1~deb12u1","115.3.1esr-1~deb10u1","115.3.1esr-1~deb11u1","115.4.0esr-1","115.4.0esr-1~deb10u1","115.4.0esr-1~deb11u1","115.4.0esr-1~deb12u1","115.5.0esr-1","115.5.0esr-1~deb10u1","115.5.0esr-1~deb11u1","115.5.0esr-1~deb12u1","115.6.0esr-1","115.6.0esr-1~deb10u1","115.6.0esr-1~deb11u1","115.6.0esr-1~deb12u1","115.7.0esr-1","115.7.0esr-1~deb10u1","115.7.0esr-1~deb11u1","115.7.0esr-1~deb12u1","115.8.0esr-1","115.8.0esr-1~deb10u1","115.8.0esr-1~deb11u1","115.8.0esr-1~deb12u1","115.9.0esr-1","115.9.0esr-1~deb11u1","115.9.0esr-1~deb12u1","115.9.0esr-2","115.9.1esr-1","115.9.1esr-1~deb10u1","115.9.1esr-1~deb11u1","115.9.1esr-1~deb12u1","128.3.0esr-1","128.3.0esr-1~deb11u1","128.3.0esr-1~deb11u2","128.3.0esr-1~deb12u1","128.3.0esr-2","128.3.1esr-1","128.3.1esr-1~deb11u1","128.3.1esr-1~deb12u1","128.3.1esr-2","128.4.0esr-1","128.4.0esr-1~deb11u1","128.4.0esr-1~deb12u1","128.5.0esr-1","128.5.0esr-1~deb11u1","128.5.0esr-1~deb12u1","128.5.1esr-1","128.6.0esr-1","128.6.0esr-1~deb11u1","128.6.0esr-1~deb11u2","128.6.0esr-1~deb11u3","128.6.0esr-1~deb12u1","128.6.0esr-2","128.6.0esr-3","128.6.0esr-4","128.7.0esr-1~deb11u1"],"ecosystem_specific":{"urgency":"not 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