Vulnerability Description
Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 encoding active. An attacker-controlled length field in the spell file's compound section overflows a 32-bit signed integer multiplication, causing a small buffer to be allocated for a write loop that runs many iterations, overflowing the heap. Because the 'spelllang' option can be set from a modeline, a text file modeline can trigger spell file loading if a malicious .spl file has been planted on the runtimepath. This issue has been patched in version 9.2.0450.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vim | Vim | < 9.2.0450 |
Related Weaknesses (CWE)
References
- https://github.com/vim/vim/commit/92993329178cb1f72d700fff45ca86e1c2d369f8Patch
- https://github.com/vim/vim/releases/tag/v9.2.0450Product
- https://github.com/vim/vim/security/advisories/GHSA-q4jv-r9gj-6cwvExploitPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/14/3Mailing ListThird Party Advisory
FAQ
What is CVE-2026-45130?
CVE-2026-45130 is a vulnerability with a CVSS score of 6.6 (MEDIUM). Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 enco...
How severe is CVE-2026-45130?
CVE-2026-45130 has been rated MEDIUM with a CVSS base score of 6.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45130?
Check the references section above for vendor advisories and patch information. Affected products include: Vim Vim.