{"id":"CVE-2026-103658","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103658","generatedAt":"2026-10-28T01:12:36.346Z","title":"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.","description":"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 <file> — 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.","published":"2026-10-12T22:17:03.000Z","lastModified":"2026-10-16T15:20:39.000Z","status":"Awaiting Analysis","sourceIdentifier":"98a01053-8a31-4f6d-9aa9-252be161adc6","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-122"],"affected":[],"epss":{"score":0.00213,"percentile":0.11567,"date":"2026-10-26","history":[{"date":"2026-10-13","score":0.00155,"percentile":0.04105}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-12T22:17:03.000Z","detail":{"score":"5.9","severity":"MEDIUM","publishedAt":"2026-10-12T22:17:03.143Z"},"summary":"New CVE, medium severity (CVSS 5.9)."}],"references":[{"url":"https://github.com/GNUAspell/aspell/security/advisories/GHSA-p35p-2mw5-fj5j","source":"98a01053-8a31-4f6d-9aa9-252be161adc6"},{"url":"https://github.com/GNUAspell/aspell/security/advisories/GHSA-p35p-2mw5-fj5j","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103658","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}