Vim up to 9.2.840 src/textprop.c prop_add_one proplen heap-based overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in Vim up to 9.2.840. The impacted element is the function prop_add_one of the file src/textprop.c. Executing a manipulation of the argument proplen can lead to heap-based overflow. This vulnerability is handled as CVE-2026-73074. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Vim up to 9.2.840. It has been declared as critical. This vulnerability affects the function prop_add_one of the file src/textprop.c. The manipulation of the argument proplen with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is 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(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Vim is an open source, command line text editor. Prior to 9.2.0841, prop_add_one() in src/textprop.c uses the proplen value from get_text_props() to increment a uint16_t property count beyond 0xffff, wrapping the count to zero and copying existing text-property records into a heap allocation sized for none of them. This issue is fixed in version 9.2.0841.

The advisory is available at github.com. This vulnerability was named CVE-2026-73074 since 08/10/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 341579 (openSUSE 16 Security Update : vim (openSUSE-SU-2026:21671-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.2.0841 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (341579) and CERT Bund (WID-SEC-2026-2513). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• SUSE Linux
• SUSE openSUSE
• Open Source vim

Productinfo

Type

• Word Processing Software

Name

• Vim

Version

• 9.2.840

License

• open-source

Website

• Product: https://github.com/vim/vim/

CPE 2.3info

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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