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CVE-2026-73075— Vim: Out-of-bounds Access in Popup Opacity Handling

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组织开源的一款高效的文本编辑器。 Vim 9.2.0469版本至9.2.0843之前版本存在缓冲区错误漏洞，该漏洞源于src/popupwin.c中的popup_mark_opacity_zindex()函数对w_winrow的错误处理，可能导致越界读取和条件写入。

CVSS 4.6 · Medium EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
vim vim >= 9.2.0469, < 9.2.0843 affected
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I. Basic Information for CVE-2026-73075

Vulnerability Information
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Vulnerability Title
Vim: Out-of-bounds Access in Popup Opacity Handling
Source: CVE Program / CVE List V5
Vulnerability Description
Vim is an open source, command line text editor. From 9.2.0469 until 9.2.0843, popup_mark_opacity_zindex() in src/popupwin.c can use a negative w_winrow for a text-property-anchored popup with clipwindow and opacity, indexing before the screen array instead of accounting for w_popup_topoff and causing an out-of-bounds read and conditional write. This issue is fixed in version 9.2.0843.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区下溢
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组织开源的一款高效的文本编辑器。 Vim 9.2.0469版本至9.2.0843之前版本存在缓冲区错误漏洞，该漏洞源于src/popupwin.c中的popup_mark_opacity_zindex()函数对w_winrow的错误处理，可能导致越界读取和条件写入。
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 >= 9.2.0469, < 9.2.0843 -

II. Public POCs for CVE-2026-73075

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III. Intelligence Information for CVE-2026-73075

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Vendor Advisories for CVE-2026-73075 (1)

Same Patch Batch · vim · 2026-08-11 · 8 CVEs total

CVE-2026-73078 8.6 HIGH Vim: Arbitrary Code Execution via Netrw Menu Construction
CVE-2026-73072 8.5 HIGH Vim: Heap Buffer Overflow when Loading a Spell File
CVE-2026-73076 8.4 HIGH Vim: Arbitrary Command Execution via Malicious `.VimballRecord` Entry Replay in `vimball.v
CVE-2026-73077 8.4 HIGH Vim: Arbitrary Code Execution via Shell Keyword Lookup
CVE-2026-73074 7.1 HIGH Vim: Heap Buffer Overflow in Text Property Handling
CVE-2026-73070 6.8 MEDIUM Vim: Stack Buffer Overflow in the Vim Socket Server
CVE-2026-73071 3.3 LOW Vim: Use-after-free in JSON Decoding

IV. Related Vulnerabilities

Same product: vim
Same vendor: vim
Same weakness: CWE-124

V. Comments for CVE-2026-73075

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