{"id":"CVE-2026-103658","details":"GNU Aspell 0.60.8.2 (first vulnerable version is not known) contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes its capacity check with a signed int ((int)s + 1), so a requested size of 0x7FFFFFFF wraps negative and the backing buffer is never grown. ReadOnlyDict::load() in modules/speller/default/readonly_ws.cpp passes the unvalidated 32-bit size fields from a .rws dictionary header into this path, so a crafted .rws file with a valid endian marker (12345678) and an oversized length field (e.g. lang_name_size = 0x7FFFFFFF) causes attacker-controlled data to be written out of bounds past an undersized heap allocation. An attacker who induces a victim to load a malicious dictionary — for example via aspell dump master \u003cfile\u003e — can corrupt heap memory, resulting in denial of service and potentially code execution. Fixed in b830b6e and will be fixed in release 0.60.8.3.","aliases":["GHSA-p35p-2mw5-fj5j"],"modified":"2026-10-16T02:30:36.496885862Z","published":"2026-10-12T21:24:48.600Z","related":["openSUSE-SU-2026:12126-1"],"database_specific":{"cwe_ids":["CWE-122"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103658.json","cna_assigner":"Anthropic"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103658.json"},{"type":"ADVISORY","url":"https://github.com/GNUAspell/aspell/security/advisories/GHSA-p35p-2mw5-fj5j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103658"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gnuaspell/aspell","events":[{"introduced":"3de79d40aee4e9ccdc0d83856637949801a3d33b"},{"last_affected":"3de79d40aee4e9ccdc0d83856637949801a3d33b"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0.60.8.2"},{"last_affected":"0.60.8.2"}]}}],"versions":["0.60.8.2","rel-0.60.8.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103658.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}