Vulnerability · Published Jul 9, 2026 · Assigned by GitHub_M
CVE-2026-59857Vim: Out-of-bounds Write in SAL Soundfolding
Medium 5.6
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 1% 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 9.2.0725, the single-byte branch of spell_soundfold_sal() in src/spell.c translates a word through a spell file's SAL sound-folding rules into a caller-owned result buffer, but its result writes are guarded with reslen < MAXWLEN, allowing reslen to reach MAXWLEN before res[reslen] = NUL writes one byte past the end of the MAXWLEN-element stack buffer. A boundary-length word passed to soundfold(), or reached via sound-based spell suggestion while a SAL-based spell language is active under a non-multibyte 8-bit encoding, can corrupt the eval_soundfold() stack frame and crash the editor. This issue is fixed in version 9.2.0725.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | vim-X11 | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-X11 | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-X11 | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-common | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-common | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-common | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-data | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:10 | vim-enhanced | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-enhanced | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-enhanced | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-filesystem | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-filesystem | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-filesystem | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-minimal | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-minimal | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-minimal | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | xxd | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| Alpine:v3.23 | vim | 9.2.0854-r0 | ALPINE-CVE-2026-59857 |
| Alpine:v3.24 | vim | 9.2.0725-r0 | ALPINE-CVE-2026-59857 |
| Debian:12 | vim | no fix listed | DEBIAN-CVE-2026-59857 |
| Debian:13 | vim | 2:9.1.1230-2+deb13u1 | DEBIAN-CVE-2026-59857 |
| Debian:14 | vim | 2:9.2.0782-1 | DEBIAN-CVE-2026-59857 |
| Rocky Linux:10 | vim | 2:9.1.083-9.el10_2.20 | RLSA-2026:66336 |
| Rocky Linux:8 | vim | 2:8.0.1763-31.el8_10.7 | RLSA-2026:66348 |
| Rocky Linux:9 | vim | 2:8.2.2637-26.el9_8.21 | RLSA-2026:66366 |
| Ubuntu:22.04:LTS | vim | 2:8.2.3995-1ubuntu2.34 | UBUNTU-CVE-2026-59857 |
| Ubuntu:22.04:LTS | vim | 2:8.2.3995-1ubuntu2.34 | USN-8541-1 |
| Ubuntu:24.04:LTS | vim | 2:9.1.0016-1ubuntu7.18 | UBUNTU-CVE-2026-59857 |
| Ubuntu:24.04:LTS | vim | 2:9.1.0016-1ubuntu7.18 | USN-8541-1 |
| Ubuntu:26.04:LTS | vim | 2:9.1.2141-1ubuntu4.7 | UBUNTU-CVE-2026-59857 |
| Ubuntu:26.04:LTS | vim | 2:9.1.2141-1ubuntu4.7 | USN-8541-1 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/vim/vim/security/advisories/GHSA-m3hf-xcm3-xhm2 x_refsource_CONFIRM
- https://github.com/vim/vim/commit/d22ff1c955ff87e8273210eae125aab0e85b6c30 x_refsource_MISC