Medium [CVE-2026-73070] Stack Buffer Overflow via unbounded socket connections
This medium-severity Red Hat Linux advisory covers CVE-2026-73070 affecting Red Hat Hardened Images.
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Summary
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.
A flaw was found in Vim. This can lead to a denial of service (DoS) for the Vim server.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-120.
Affected Red Hat products: Red Hat Hardened Images. Under investigation: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Red Hat fixing advisory: RHSA-2026:56636.
- < 9.2.0842
Official advisory · high-confidence parse· fetched 30 days ago·verify at source
- 9.2.0842
- vim-main-9.2.967-1.hum1
- RHSA-2026:56636
Official advisory · high-confidence parse· fetched 30 days ago·verify at source
Mitigation
Upgrade to a fixed release: 9.2.0842, vim-main-9.2.967-1.hum1, RHSA-2026:56636. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 30 days ago·verify at source
Discussion(0)
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