Vulnerability · Published Aug 24, 2025 · Assigned by VulDB

CVE-2025-9389vim memmove-vec-unaligned-erms.S __memmove_avx_unaligned_erms memory corruption

Low 3.3

In plain English

A low-severity memory corruption in vim. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low

Exploit odds (30 days)0.2%top 86.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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".

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:22.04:LTS	vim	no fix listed	UBUNTU-CVE-2025-9389
Ubuntu:24.04:LTS	vim	no fix listed	UBUNTU-CVE-2025-9389

Affected products (as reported)

Vendor	Product	Versions
n/a	vim	9.1.0000

Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C

References

VDB-321222 | vim memmove-vec-unaligned-erms.S __memmove_avx_unaligned_erms memory corruption vdb-entry, technical-description
VDB-321222 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #630898 | vim xxd vim-9.1.0000 and related xxd versions (latest master branch) Memory Corruption third-party-advisory
https://github.com/vim/vim/issues/17940 issue-tracking
https://github.com/vim/vim/issues/17940#issuecomment-3203415781 issue-tracking
https://drive.google.com/file/d/1iFbTpW79vqBPkFjWYzGYIh_E6esPhYVY/view?usp=sharing exploit