CVE-2026-111677

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.

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