Medium severity · published Aug 11, 2026
CVE-2026-73070
Vim: Stack Buffer Overflow in the Vim Socket Server
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
Vim is an open source, command line text editor. Prior to 9.2.0842, the socket server backend in src/socketserver.c accepts unbounded client connections in socketserver_accept(), causing descriptors to overflow fd_set structures in src/channel.c and fixed-size struct pollfd arrays in src/os_unix.c, which allows a local process that can connect to the server socket to corrupt stack memory or terminate the Vim server. This issue is fixed in version 9.2.0842.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vim · vim
< 9.2.0842 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73070
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73070
Patch
https://github.com/vim/vim/commit/5598618b2daf8e36b3bf0251caaefcf0bf8e85e4
Product
https://github.com/vim/vim/releases/tag/v9.2.0842
Patch
https://github.com/vim/vim/security/advisories/GHSA-49m8-wwxj-mr69
More from vim
9.8
CVE-2020-20703
Buffer Overflow vulnerability in VIM v.8.1.2135 allows a remote attacker to execute arbitrary code via the operand parameter
9.8
CVE-2022-3520
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0765
9.8
CVE-2022-0318
Heap-based Buffer Overflow in vim/vim prior to 8.2
9.8
CVE-2017-6350
An integer overflow at an unserialize_uep memory allocation site would occur for vim before patch 8.0.0378, if it does not properly validate values for tree length when reading a…
9.8
CVE-2017-6349
An integer overflow at a u_read_undo memory allocation site would occur for vim before patch 8.0.0377, if it does not properly validate values for tree length when reading a…