CVE-2026-73071Vim: Use-after-free in JSON Decoding

Description

Vim is an open source, command line text editor. From 9.2.0511 until 9.2.0844, json_decode_item() in src/json.c can retain a stale pointer after json_decode_string() invokes channel_fill() to refill and free the current buffer, causing the error path to read freed memory instead of reader->js_buf + reader->js_used when an invalid JSON string spans buffers. This issue is fixed in version 9.2.0844.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/vim/vim/security/advisories/GHSA-69ch-22ch-r887 PatchVendor Advisory
• https://github.com/vim/vim/commit/f8126294a526aa80c5123eb3079e325daee9ec75 Patch
• https://github.com/vim/vim/releases/tag/v9.2.0844 Product