High [CVE-2026-73072] Heap buffer overflow allows arbitrary code execution
This high-severity Red Hat Linux advisory covers CVE-2026-73072 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
A heap buffer overflow in Vim allows a local attacker to cause a denial of service or potentially execute arbitrary code. The flaw is triggered by processing a specially crafted spell file, where the set_sofo() function fails to reset internal data between sections, leading to an out-of-bounds write.
Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-787.
Affected Red Hat products: 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 lists Red Hat Hardened Images; Red Hat OpenShift Container Platform 4 as not affected.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: vim.
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 3 hours ago·verify at source
- 9.2.0846
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
- If spell checking is unused, disable it with set nospell in ~/.vimrc and do not set spelllang. If spell is required, load only trusted .spl files from Vim’s spell directories and do not place untrusted spell files on runtimepath. Additionally, consider disabling modelines (set nomodeline in ~/.vimrc) to prevent untrusted text files from automatically overriding these settings when opened.
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
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