Vulnerability Monitor

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CVE-2025-55158

Vim is an open source, command line text editor. In versions from 9.1.1231 to before 9.1.1406, when processing nested tuples during Vim9 script import operations, an error during evaluation can trigger a double-free in Vim’s internal typed value (typval_T) management. Specifically, the clear_tv() function may attempt to free memory that has already been deallocated, due to improper lifetime handling in the handle_import / ex_import code paths. The vulnerability can only be triggered if a user explicitly opens and executes a specially crafted Vim script. This issue has been patched in version 9.1.1406.

Published

2025-08-11T23:15:28.037

Last Modified

2025-08-12T18:49:05.347

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

Weaknesses

Type: Secondary
CWE-415

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	vim	vim	< 9.1.1406	Yes

References

https://github.com/vim/vim/commit/9772025d24e939fd84b85748ce35c26874c05775 Patch ([email protected])
https://github.com/vim/vim/releases/tag/v9.1.1406 Patch ([email protected])
https://github.com/vim/vim/security/advisories/GHSA-5fg8-wvx3-583x Vendor Advisory ([email protected])