What’s Vulnerable › Vulnerabilities

CVE-2026-111678: Antiword through 0.37 Stack Out-of-Bounds Read via prop8.c FKP Parsing

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-16 · updated 2026-10-23
• Weakness: CWE-125

Description

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 pages to read past the 512-byte stack buffer, crashing antiword or corrupting style parsing.

Affected products

• Adri van Os antiword: through 0.37

References

• https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L1461-L1474
• https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L997-L1022
• https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read
• https://www.vulncheck.com/advisories/antiword-through-0.37-stack-out-of-bounds-read-via-prop8-c-fkp-parsing
• https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read

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