Out-of-bounds write in Vim - CVE-2026-59857

Vulnerability identifier: #VU135167

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-59857

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to out-of-bounds write in the SAL sound-folding logic in spell_soundfold_sal() when processing a boundary-length word through soundfold() with a SAL-based spell language active. A local user can supply a crafted boundary-length word to cause a denial of service.

The vulnerable path is only reached under a non-multibyte 8-bit encoding such as latin1, and spell checking must be enabled with a SAL-based language.

Vim
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
Ubuntu
Desktop Applications Module
Basesystem Module
openSUSE Leap
openEuler
vim (Ubuntu package)
vim-filesystem
vim
vim-X11
vim-common
vim-debuginfo
vim-debugsource
vim-enhanced
vim-minimal
vim-data-common
vim-data
gvim
gvim-debuginfo
vim-small
vim-small-debuginfo

Install security update from vendor's website.

Vim - update to 9.2.0725
vim (Ubuntu package) - addressed in versions 2:7.4.052-1ubuntu3.1+esm31, 2:7.4.1689-3ubuntu1.5+esm37, 2:8.0.1453-1ubuntu1.13+esm22, 2:8.1.2269-1ubuntu5.32+esm10, 2:8.2.3995-1ubuntu2.34, 2:9.1.0016-1ubuntu7.18, 2:9.1.2141-1ubuntu4.7
vim-filesystem - update to 9.0-53
vim - update to 9.0-53
vim-X11 - update to 9.0-53
vim-common - update to 9.0-53
vim-debuginfo - update to 9.0-53
vim-debugsource - update to 9.0-53
vim-enhanced - update to 9.0-53
vim-minimal - update to 9.0-53
vim-debuginfo - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
vim-data-common - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
vim-data - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
vim - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
gvim - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
gvim-debuginfo - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
vim-small - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
vim-debugsource - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2
vim-small-debuginfo - addressed in versions 9.2.0780-150000.5.99.1, 9.2.0780-150500.20.61.2

• https://github.com/vim/vim/security/advisories/GHSA-m3hf-xcm3-xhm2
• https://github.com/vim/vim/commit/d22ff1c955ff87e8273210eae125aab0e85b6c30

• Out-of-bounds write in Vim
• Ubuntu update for vim
• openEuler update for vim
• SUSE update for vim
• SUSE update for vim