{"id":"CVE-2026-75820","state":"PUBLISHED","title":"Integer Truncation Leading to Heap Corruption in GNU Aspell","description":"GNU Aspell contains an integer truncation vulnerability in the WritableDict::add() function in modules/speller/default/writable.cpp. When loading a personal wordlist, the word length is stored as a single byte, causing truncation for words whose length is a multiple of 256. This leads to heap corruption. An attacker can exploit this by convincing a user to run aspell with a crafted personal wordlist containing such a word, resulting in denial of service.\n\n\n\nThis issue was fixed in commit 782ce94e4dc71eaec4ee1bd945eb3b9c47c5387d which will be released in version 0.60.8.3.","publishedAt":"2026-10-06T10:57:59.621Z","updatedAt":"2026-10-06T12:49:39.265Z","severity":{"score":1.8,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:L/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["GNU Aspell"],"affected":[{"vendor":"GNU","product":"Aspell","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"0.60.8.3","versionType":"semver"}],"repo":"https://github.com/GNUAspell/aspell","modules":["WritableDict::add()"],"programFiles":["modules/speller/default/writable.cpp"]}],"references":["https://cert.pl/en/posts/2026/10/CVE-2026-75818","http://aspell.net/"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/75xxx/CVE-2026-75820.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75820","state":"PUBLISHED","datePublished":"2026-10-06T10:57:59.621Z","dateUpdated":"2026-10-06T12:49:39.265Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-08-18T10:13:29.246Z"},"containers":{"cna":{"title":"Integer Truncation Leading to Heap Corruption in GNU Aspell","descriptions":[{"lang":"en","value":"GNU Aspell contains an integer truncation vulnerability in the WritableDict::add() function in modules/speller/default/writable.cpp. When loading a personal wordlist, the word length is stored as a single byte, causing truncation for words whose length is a multiple of 256. 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