# CVE-2026-73070: Vim: Stack Buffer Overflow in the Vim Socket Server

CVE-2026-73070 is fixed in 13 products on 1 platform, first by DEBIAN-CVE-2026-73070, released August 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-73070
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 11, 2026
- Weakness: Stack-based Buffer Overflow
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73070

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | vim Debian 14 | 2:9.2.0858-1 | [DEBIAN-CVE-2026-73070](https://patchblox.com/security/data/fix/linux/debian-cve-2026-73070.md) | Aug 13, 2026 |
| Linux | vim opensuse-leap 16.0 | 9.2.0957-160000.1.1 | [OPENSUSE-SU-2026:21671-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21671-1.md) | Aug 28, 2026 |
| Linux | vim sles 15.6 | 9.2.0957-150500.20.64.1 | [SUSE-SU-2026:3680-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3680-1.md) | Aug 21, 2026 |
| Linux | vim sles 15.7 | 9.2.0957-150500.20.64.1 | [SUSE-SU-2026:3680-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3680-1.md) | Aug 21, 2026 |
| Linux | vim sles 16.0 | 9.2.0957-160000.1.1 | [SUSE-SU-2026:23552-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23552-1.md) | Aug 28, 2026 |
| Linux | vim-common amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-data amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-debuginfo amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-debugsource amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-default-editor amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-enhanced amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-enhanced-debuginfo amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-filesystem amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-minimal amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | vim-minimal-debuginfo amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | xxd amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |
| Linux | xxd-debuginfo amzn 2023 | 2:9.2.920-1.amzn2023.0.1 | [ALAS2023-2026-2108](https://patchblox.com/security/data/fix/linux/alas2023-2026-2108.md) | Aug 31, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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