Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken. For each screen cell it walks the cell's chars[] array with no upper bound, stopping only when it encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots — a base character plus five combining marks — the bundled libvterm returns the array without a terminating NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in version 9.2.0565.
References
| Link | Resource |
|---|---|
| https://github.com/vim/vim/commit/63680c6d3d52477817b49cd1a66e7aabe8a7aa19 | Patch |
| https://github.com/vim/vim/releases/tag/v9.2.0565 | Release Notes |
| https://github.com/vim/vim/security/advisories/GHSA-47gw-8gc3-mgcm | Vendor Advisory |
Configurations
History
15 Jun 2026, 13:12
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Vim vim
Vim |
|
| References | () https://github.com/vim/vim/commit/63680c6d3d52477817b49cd1a66e7aabe8a7aa19 - Patch | |
| References | () https://github.com/vim/vim/releases/tag/v9.2.0565 - Release Notes | |
| References | () https://github.com/vim/vim/security/advisories/GHSA-47gw-8gc3-mgcm - Vendor Advisory | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.2 |
| CPE | cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:* |
11 Jun 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-11 19:16
Updated : 2026-06-17 10:57
NVD link : CVE-2026-52859
Mitre link : CVE-2026-52859
CVE.ORG link : CVE-2026-52859
JSON object : View
Products Affected
vim
- vim
CWE
CWE-125
Out-of-bounds Read