What’s Vulnerable › Vulnerabilities

CVE-2026-111677: Antiword through 0.37 Heap Out-of-Bounds Read via vGet8LstInfo in prop8.c

• Severity: medium (CVSS 5.5 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 2026-10-20
• Weakness: CWE-125

Description

Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF records in a tiny buffer, causing reads past the heap allocation that crash the process.

Affected products

• Adri van Os antiword: through 0.37

References

• https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L799-L825
• https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read
• https://www.vulncheck.com/advisories/antiword-through-0.37-heap-out-of-bounds-read-via-vget8lstinfo-in-prop8-c
• https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read

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