Low [CVE-2026-73071] Denial of Service via Use-After-Free in JSON Decoding
This low-severity Red Hat Linux advisory covers CVE-2026-73071.
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Summary
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. A flaw was found in Vim.
This can lead to the program attempting to read freed memory, potentially resulting in a denial of service for a local user. Fedora and Hummingbird already ship 9.2.920, which is past the fix.
No Red Hat product is affected by this vulnerability. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
Weakness: CWE-416. Red Hat lists 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 Hardened Images; Red Hat OpenShift Container Platform 4 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 9.2.0844
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Not applicable -- no Red Hat product ships a vim version within the vulnerable range.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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