{"id":"CVE-2026-110247","revision":"2786df751af04d7eada50d35fbb21488","records":[{"revision":"2786df751af04d7eada50d35fbb21488","observedAt":"2026-10-27T19:45:55.783+00:00","statement":{"source":"cve-program","id":"CVE-2026-110247","aliases":[],"title":"Integer overflow in libmime buffer growth could lead to heap corruption","description":"Several buffer-growth sites in libmime performed size arithmetic in 32-bit types without overflow checks. On a sufficiently large message the growth guard could fail open, or the buffer could be reallocated smaller than required, and a subsequent memcpy would then write attacker-controlled data across adjacent heap allocations. This vulnerability was fixed in Thunderbird 158 and Thunderbird 153.6.","state":0,"publishedAt":"2026-10-13T18:08:37.608+00:00","modifiedAt":"2026-10-27T18:27:45.455+00:00","affected":[{"ecosystem":"Vendor product","name":"Thunderbird","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Thunderbird\",\n                    \"vendor\": \"Mozilla\",\n                    \"versions\": [\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"153.6\",\n                            \"lessThanOrEqual\": \"153.*\",\n                            \"versionType\": \"rpm\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"158\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"versionType\": \"rpm\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2071621","https://www.mozilla.org/security/advisories/mfsa2026-109/","https://www.mozilla.org/security/advisories/mfsa2026-122/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110247","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110247","identifiers":["CVE-2026-110247"]},"retained":false,"historicalAffected":[]}],"coverage":[]}