Vim up to 9.2.669 Undo File src/textprop.c get_text_props out-of-bounds

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Vim up to 9.2.669. This issue affects the function get_text_props of the file src/textprop.c of the component Undo File Handler. This manipulation causes out-of-bounds. This vulnerability is tracked as CVE-2026-57451. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Vim up to 9.2.669 and classified as problematic. Affected by this vulnerability is the function get_text_props of the file src/textprop.c of the component Undo File Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Vim is an open source, command line text editor. Prior to 9.2.0670, get_text_props() in src/textprop.c reads a uint16 property count stored inline after a line's text and returns it as the number of 32-byte textprop_T entries that follow. The only check is a floor that guarantees room for a single entry; the count is never checked against the amount of data actually present. A line that declares a large count while carrying little data causes consumers to read far past the end of the line buffer. Such a line can be delivered through a crafted undo file, leading to a crash. This vulnerability is fixed in 9.2.0670.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-57451 since 06/24/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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.

Upgrading to version 9.2.0670 eliminates this vulnerability.

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Productinfo

Type

• Word Processing Software

Name

• Vim

Version

• 9.2.669

License

• open-source

Website

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

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