Server termination via unbounded socket connections
Published Aug 11, 2026 · Updated Aug 11, 2026
Stack-based buffer overflow in Vim before 9.2.0842 allows local users to terminate a running server through its socket interface. The socketserver_accept() path admits unbounded clients, then wait-loop code writes their descriptors beyond fixed fd_set or pollfd stack storage. The affected build must include the socket-server backend and run with --servername; the default Unix socket generally requires the same user account.
Summary
What happened
Stack-based buffer overflow in Vim before 9.2.0842 allows local users to terminate a running server through its socket interface. The socketserver_accept() path admits unbounded clients, then wait-loop code writes their descriptors beyond fixed fd_set or pollfd stack storage. The affected build must include the socket-server backend and run with --servername; the default Unix socket generally requires the same user account.
The record
- CVE
- CVE-2026-73070
- Published
- Aug 11, 2026
- Updated
- Aug 11, 2026
- Vendor
- Vim
- Product
- Vim
- Classifications
- CWE-121, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 9.2.0842
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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