{"id":"CLSA-2026-1783601793","summary":"thunderbird: Fix of 3 CVEs","details":"- CVE-2026-2759: out-of-bounds read in AVIF ByteStream reader; validate\n  offset/size via CheckedInt\u003csize_t\u003e before pointer arithmetic and swap\n  the sign-mismatched \u003e= for \u003e in GetContiguousAccess (Bug 2010933,\n  upstream facd3303abe7)\n- CVE-2026-2778: out-of-bounds heap read in StructuredCloneBlob IPC\n  deserialization; route BlobImpls copy through Span::Subspan so the\n  bounds check triggers a hard abort instead of leaking parent-process\n  memory (Bug 2016358, upstream 1479f78b642c)\n- CVE-2026-4689: integer overflow / sandbox escape in SlicedInputStream\n  IPC deserialization; validate start+length via CheckedUint64 and\n  reject when curPos exceeds the computed end (Bug 2016374, upstream\n  14db1934383f)","modified":"2026-10-26T09:30:02.903084533Z","published":"2026-07-09T12:56:51Z","upstream":["CVE-2026-2759","CVE-2026-2778","CVE-2026-4689"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1783601793.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2759"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2778"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4689"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/thunderbird?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"115.4.1-1.el9_2.alma.tuxcare.els19"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1783601793.json"}}],"schema_version":"1.9.0"}