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CVE-2026-73074— Vim: Heap Buffer Overflow in Text Property Handling

Quick assessment

Affected
vim vim
Exploitation
Public or AI PoC available; prioritize validation
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 9.2.0841之前版本存在数字错误漏洞，该漏洞源于prop_add_one()函数使用get_text_props()返回的proplen值递增uint16_t属性计数，导致计数超过0xffff回绕为零，并将现有文本属性记录复制到大小为零的堆分配中，可能导致内存破坏或拒绝服务。

CVSS 7.1 · High EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
vim vim < 9.2.0841 affected
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I. Basic Information for CVE-2026-73074

Vulnerability Information
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Vulnerability Title
Vim: Heap Buffer Overflow in Text Property Handling
Source: CVE Program / CVE List V5
Vulnerability Description
Vim is an open source, command line text editor. Prior to 9.2.0841, prop_add_one() in src/textprop.c uses the proplen value from get_text_props() to increment a uint16_t property count beyond 0xffff, wrapping the count to zero and copying existing text-property records into a heap allocation sized for none of them. This issue is fixed in version 9.2.0841.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Vim 数字错误漏洞
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 9.2.0841之前版本存在数字错误漏洞，该漏洞源于prop_add_one()函数使用get_text_props()返回的proplen值递增uint16_t属性计数，导致计数超过0xffff回绕为零，并将现有文本属性记录复制到大小为零的堆分配中，可能导致内存破坏或拒绝服务。
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 < 9.2.0841 -

II. Public POCs for CVE-2026-73074

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6120 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-73074

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Patches & Fixes for CVE-2026-73074 (1)

Vendor Advisories for CVE-2026-73074 (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-2026-73070 6.8 MEDIUM Vim: Stack Buffer Overflow in the Vim Socket Server
CVE-2026-73075 4.6 MEDIUM Vim: Out-of-bounds Access in Popup Opacity Handling
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-190

V. Comments for CVE-2026-73074

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