Vim up to 9.2.0845 Spell File src/spellfile.c set_sofo sl_sal_first heap-based overflow

Summaryinfo

A vulnerability was found in Vim up to 9.2.0845. It has been rated as critical. The affected element is the function set_sofo of the file src/spellfile.c of the component Spell File Handler. Performing a manipulation of the argument sl_sal_first results in heap-based overflow. This vulnerability is known as CVE-2026-73072. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Vim up to 9.2.0845. It has been classified as critical. This affects the function set_sofo of the file src/spellfile.c of the component Spell File Handler. The manipulation of the argument sl_sal_first with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as 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(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Vim is an open source, command line text editor. Prior to 9.2.0846, set_sofo() in src/spellfile.c reuses sl_sal_first[] without resetting values left by set_sal_first(), so a crafted spell file containing an SN_SAL section before an SN_SOFO section causes under-counted mapping lists and attacker-influenced writes beyond a heap allocation. This issue is fixed in version 9.2.0846.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-73072 since 08/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 9.2.0846 eliminates this vulnerability.

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Productinfo

Type

• Word Processing Software

Name

• Vim

Version

• 9.2.0845

License

• open-source

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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