CVE-2026-111678 Antiword through 0.37 Stack Out-of-Bounds Read via prop8.c FKP Parsing
Attackers can cause denial of service or read sensitive memory by supplying a crafted .doc file to the Antiword library.
- 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-2026-111678?
CVE-2026-111678 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 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-111678?
It affects 1 product.
Products include Antiword Project Antiword.
How do I fix CVE-2026-111678?
No fix has been published for CVE-2026-111678 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-2026-111678 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111678 exists.
Other vulnerabilities in Adri van Os antiword
Sources
Also known as DEBIAN-CVE-2026-111678, GHSA-gmg3-h7rv-2cc6, UBUNTU-CVE-2026-111678.