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CVE-2025-9389

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Date: August 24, 2025

A vulnerability was identified in vim 9.1.0000. Affected is the function __memmove_avx_unaligned_erms of the file memmove-vec-unaligned-erms.S. The manipulation leads to memory corruption. The attack needs to be performed locally. The exploit is publicly available and might be used. Some users are not able to reproduce this. One of the users mentions that this appears not to be working, "when coloring is turned on".

Severity Score

Related Resources (8)

https://vuldb.com/?submit.630898
https://vuldb.com/?ctiid.321222
https://github.com/vim/vim/issues/17940#issuecomment-3203415781
https://drive.google.com/file/d/1iFbTpW79vqBPkFjWYzGYIh_E6esPhYVY/view?usp=sharing
https://vuldb.com/?id.321222
https://github.com/vim/vim/issues/17940
https://nvd.nist.gov/vuln/detail/CVE-2025-9389
https://www.mend.io/vulnerability-database/CVE-2025-9389

Severity Score

Weakness Type (CWE)

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-119

Out-of-bounds Write

CWE-787

Top Fix

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Upgrade to version https://github.com/vim/vim.git - v9.1.1683

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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