Adri van Os Antiword up to 0.37 PlcfLst prop8.c vGet8LstInfo heap-based overflow

Summaryinfo

A vulnerability marked as critical has been reported in Adri van Os Antiword up to 0.37. The impacted element is the function vGet8LstInfo of the file prop8.c of the component PlcfLst. The manipulation leads to heap-based overflow. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is traded as CVE-2026-111677. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Adri van Os Antiword up to 0.37 and classified as critical. This issue affects the function vGet8LstInfo of the file prop8.c of the component PlcfLst. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at hackmd.io. The identification of this vulnerability is CVE-2026-111677 since 10/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Adri van Os

Name

• Antiword

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37

Support

• end of life

CPE 2.3info

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