CVE-2026-111677 Antiword through 0.37 Heap Out-of-Bounds Read via vGet8LstInfo in prop8.c
Attackers can crash the application by providing a crafted Word document that triggers a heap out-of-bounds read in the Antiword parser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-111677?
CVE-2026-111677 is a medium-severity memory corruption vulnerability in Adri van Os antiword, published on 16 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-111677?
It affects 1 product.
Products include Antiword Project Antiword.
How do I fix CVE-2026-111677?
No fix has been published for CVE-2026-111677 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-111677 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111677 exists.
Other vulnerabilities in Adri van Os antiword
Sources
Also known as DEBIAN-CVE-2026-111677, GHSA-v4mq-qwjh-99x8, UBUNTU-CVE-2026-111677.