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CVE-2026-59857— Vim: Out-of-bounds Write in SAL Soundfolding

Quick assessment

Affected
vim vim
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vim是Vim组织开源的一款跨平台的文本编辑器。 Vim 9.2.0725之前版本存在缓冲区错误漏洞，该漏洞源于src/spell.c文件中的spell_soundfold_sal()函数单字节分支存在越界写入问题，可能破坏eval_soundfold()堆栈帧并导致编辑器崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
vim vim < 9.2.0725 affected
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I. Basic Information for CVE-2026-59857

Vulnerability Information
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Vulnerability Title
Vim: Out-of-bounds Write in SAL Soundfolding
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Vim 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vim是Vim组织开源的一款跨平台的文本编辑器。 Vim 9.2.0725之前版本存在缓冲区错误漏洞，该漏洞源于src/spell.c文件中的spell_soundfold_sal()函数单字节分支存在越界写入问题，可能破坏eval_soundfold()堆栈帧并导致编辑器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vim vim < 9.2.0725 -

II. Public POCs for CVE-2026-59857

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III. Intelligence Information for CVE-2026-59857

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Patches & Fixes for CVE-2026-59857 (1)

Vendor Advisories for CVE-2026-59857 (1)

Same Patch Batch · vim · 2026-07-09 · 3 CVEs total

CVE-2026-59856 Vim: Arbitrary Code Execution via PHP Omni-Completion
CVE-2026-59858 Vim: Arbitrary Code Execution via C Omni-Completion

IV. Related Vulnerabilities

Same product: vim
Same vendor: vim
Same weakness: CWE-787

V. Comments for CVE-2026-59857

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