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 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 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 Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Ubuntu
Desktop Applications Module
Basesystem Module
openSUSE Leap
openEuler
Anolis OS
vim (Ubuntu package)
vim (Red Hat package)
vim-debugsource
vim-filesystem
vim-minimal
vim-enhanced
vim-debuginfo
vim-common
vim-X11
vim
vim-doc
vim-data
vim-small-debuginfo
vim-small
gvim-debuginfo
gvim
vim-data-common

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 (Red Hat package) - addressed in versions 8.0.1763-31.el8_10.7, 8.2.2637-26.el9_8.21, 9.1.083-9.el10_2.20
vim-debugsource - update to 9.0-53
vim-filesystem - update to 9.0-53
vim-minimal - update to 9.0-53
vim-enhanced - update to 9.0-53
vim-debuginfo - update to 9.0-53
vim-common - update to 9.0-53
vim-X11 - update to 9.0-53
vim - update to 9.0-53
vim-filesystem - update to 9.0.2092-20
vim-doc - update to 9.0.2092-20
vim-data - update to 9.0.2092-20
vim-minimal - update to 9.0.2092-20
vim-enhanced - update to 9.0.2092-20
vim-common - update to 9.0.2092-20
vim-X11 - update to 9.0.2092-20
vim-data - 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
vim-debuginfo - 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 - 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
gvim - 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
vim-data-common - 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
• Anolis OS update for vim
• Red Hat Enterprise Linux 10 update for vim
• Red Hat Enterprise Linux 8 update for vim
• Red Hat Enterprise Linux 9 update for vim