Vulnerability · Published Jun 25, 2026 · Assigned by GitHub_M
CVE-2026-57455Vim: Stack out-of-bounds write in `spell_soundfold_sofo()` via an over-length `soundfold()` argument
Medium 4.0
In plain English
A medium-severity out-of-bounds write in vim from vim. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Vim is an open source, command line text editor. Prior to 9.2.0698, the single-byte branch of spell_soundfold_sofo() in src/spell.c translates a word through a spell file's SOFO (sound-folding) byte map into a caller-owned result buffer. Its copy loop advances the output index ri with no upper bound and terminates only on the input NUL, writing one byte per input byte into the MAXWLEN-element stack buffer the caller provides. A word longer than MAXWLEN, passed to soundfold() (or reached via sound-based spell suggestion) while a SOFO-based spell language is active, therefore writes past the end of that buffer. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0698.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | vim-X11 | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| AlmaLinux:8 | vim-X11 | 2:8.0.1763-31.el8_10 | ALSA-2026:48703 |
| AlmaLinux:9 | vim-X11 | 2:8.2.2637-26.el9_8.13 | ALSA-2026:47982 |
| AlmaLinux:10 | vim-common | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| AlmaLinux:8 | vim-common | 2:8.0.1763-31.el8_10 | ALSA-2026:48703 |
| AlmaLinux:9 | vim-common | 2:8.2.2637-26.el9_8.13 | ALSA-2026:47982 |
| AlmaLinux:10 | vim-data | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| AlmaLinux:10 | vim-enhanced | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| AlmaLinux:8 | vim-enhanced | 2:8.0.1763-31.el8_10 | ALSA-2026:48703 |
| AlmaLinux:9 | vim-enhanced | 2:8.2.2637-26.el9_8.13 | ALSA-2026:47982 |
| AlmaLinux:10 | vim-filesystem | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| AlmaLinux:8 | vim-filesystem | 2:8.0.1763-31.el8_10 | ALSA-2026:48703 |
| AlmaLinux:9 | vim-filesystem | 2:8.2.2637-26.el9_8.13 | ALSA-2026:47982 |
| AlmaLinux:10 | vim-minimal | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| AlmaLinux:8 | vim-minimal | 2:8.0.1763-31.el8_10 | ALSA-2026:48703 |
| AlmaLinux:9 | vim-minimal | 2:8.2.2637-26.el9_8.13 | ALSA-2026:47982 |
| AlmaLinux:10 | xxd | 2:9.1.083-9.el10_2.12 | ALSA-2026:48650 |
| Alpine:v3.23 | vim | 9.2.0854-r0 | ALPINE-CVE-2026-57455 |
| Alpine:v3.24 | vim | 9.2.0699-r0 | ALPINE-CVE-2026-57455 |
| Debian:12 | vim | no fix listed | DEBIAN-CVE-2026-57455 |
| Debian:13 | vim | 2:9.1.1230-2+deb13u1 | DEBIAN-CVE-2026-57455 |
| Debian:14 | vim | 2:9.2.0782-1 | DEBIAN-CVE-2026-57455 |
| Rocky Linux:10 | vim | 2:9.1.083-9.el10_2.12 | RLSA-2026:48650 |
| Rocky Linux:8 | vim | 2:8.0.1763-31.el8_10 | RLSA-2026:48703 |
| Rocky Linux:9 | vim | 2:8.2.2637-26.el9_8.13 | RLSA-2026:47982 |
| Ubuntu:22.04:LTS | vim | 2:8.2.3995-1ubuntu2.33 | USN-8500-1 |
| Ubuntu:22.04:LTS | vim | 2:8.2.3995-1ubuntu2.33 | UBUNTU-CVE-2026-57455 |
| Ubuntu:24.04:LTS | vim | 2:9.1.0016-1ubuntu7.17 | USN-8500-1 |
| Ubuntu:24.04:LTS | vim | 2:9.1.0016-1ubuntu7.17 | UBUNTU-CVE-2026-57455 |
| Ubuntu:25.10 | vim | 2:9.1.0967-1ubuntu6.8 | UBUNTU-CVE-2026-57455 |
| Ubuntu:25.10 | vim | 2:9.1.0967-1ubuntu6.8 | USN-8500-1 |
| Ubuntu:26.04:LTS | vim | 2:9.1.2141-1ubuntu4.6 | USN-8500-1 |
| Ubuntu:26.04:LTS | vim | 2:9.1.2141-1ubuntu4.6 | UBUNTU-CVE-2026-57455 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
References
- https://github.com/vim/vim/security/advisories/GHSA-q8mh-6qm3-25g4 x_refsource_CONFIRM
- https://github.com/vim/vim/commit/497f931f85339d175d7f69588dd249e8ccfed41b x_refsource_MISC
- https://github.com/vim/vim/releases/tag/v9.2.0698 x_refsource_MISC