{"id":"CVE-2026-111678","title":"Antiword through 0.37 Stack Out-of-Bounds Read via prop8.c FKP Parsing","summary":"Antiword through 0.37 contains a stack out-of-bounds read vulnerability in vGet8PapInfo and vGet8ChrInfo in prop8.c because FKP run counts and grpprl offsets are not bounded. Attackers can supply a crafted .doc file with malicious FKP pa…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Adri van Os","product":"antiword","affected":["antiword <= 0.37"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-23T14:03:08.685949Z"},"exploitAvailable":true,"published":"2026-10-16","updated":"2026-10-23","sourceUpdated":"2026-10-23T14:03:28.591Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111678","references":[{"url":"https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read"},{"url":"https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L997-L1022"},{"url":"https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L1461-L1474"},{"url":"https://www.vulncheck.com/advisories/antiword-through-0.37-stack-out-of-bounds-read-via-prop8-c-fkp-parsing","label":"VulnCheck Advisory: Antiword through 0.37 Stack Out-of-Bounds Read via prop8.c FKP Parsing"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111678.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-111678"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-111678"}],"tags":["cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00222,"epssPercentile":0.12709,"ingestedAt":"2026-10-16T18:43:08.664Z","slug":"CVE-2026-111678","body":"## Overview\n\nAntiword through 0.37 contains a stack out-of-bounds read vulnerability in vGet8PapInfo and vGet8ChrInfo in prop8.c because FKP run counts and grpprl offsets are not bounded. Attackers can supply a crafted .doc file with malicious FKP pages to read past the 512-byte stack buffer, crashing antiword or corrupting style parsing.\n\n## Affected\n\n- `antiword <= 0.37`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111678.json)","depth":"twilight","depthScore":30,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":228282,"id":"CVE-2026-111678","ts":1792765732077,"field":"exploit_available","old":"false","new":"true"}]}