# CVE-2026-57454: Vim out-of-bounds read in virtual-text property handling

Source: https://junglewise.ai/threats/cve-2026-57454-vim-out-of-bounds-read-in-virtual-text-property-handling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-57454 · Severity: info · CVSS 6.8 · Published 2026-06-25

Vim is a widely used open-source text editor. A vulnerability exists where opening a specially crafted undo or swap file can cause the application to read memory outside of its intended boundaries. This can lead to an immediate crash of the editor or the potential exposure of sensitive information stored in the computer's memory.

Technologies: [Vim](https://junglewise.ai/threats/technologies/vim). Vendors: [Vim](https://junglewise.ai/threats/vendors/vim).

## Quick answers

**Is CVE-2026-57454 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57454 being exploited in the wild.

**How severe is CVE-2026-57454?** Informational severity, with a CVSS score of 6.8, published 25 June 2026.

**Which products and versions are affected?** Vim >= 9.2.0320, < 9.2.0679.

**Is there a fix for CVE-2026-57454?** A patch was published on 2026-06-20: Fixed in Vim patch 9.2.0679 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-57454 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-57454?** Check whether you run Vim at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An out-of-bounds read vulnerability (CWE-125) exists in Vim's handling of text properties stored in undo and swap files. Since patch 9.2.0320, text properties are stored inline; however, the application failed to validate that the 'tp_text_offset' and 'tp_len' for virtual-text properties remained within the bounds of the property data buffer. When Vim restores or displays a line from a malicious file, it converts the untrusted offset into a pointer without bounds checking. An attacker can exploit this by providing a crafted file that, when opened or recovered by a user, causes a heap-based out-of-bounds read. This can result in a denial of service (crash) or the disclosure of adjacent heap memory. The issue is resolved in version 9.2.0679.

## Affected products

- Vim Vim >= 9.2.0320, < 9.2.0679

## Timeline

- 2026-06-20: advisory: GitHub Security Advisory published
- 2026-06-20: patched: Fixed in Vim patch 9.2.0679
- 2026-06-25: disclosed: NVD publication date

## References

- [https://github.com/vim/vim/commit/b3faeecc976d3031d7c0675623516ec60c30f949](https://github.com/vim/vim/commit/b3faeecc976d3031d7c0675623516ec60c30f949)
- [https://github.com/vim/vim/releases/tag/v9.2.0679](https://github.com/vim/vim/releases/tag/v9.2.0679)
- [https://github.com/vim/vim/security/advisories/GHSA-ww8h-47xp-hp4w](https://github.com/vim/vim/security/advisories/GHSA-ww8h-47xp-hp4w)

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