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Vim EUVDEUVD-2026-56226

| CVE-2026-73072 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-08-11 GitHub_M
Heap Overflow Buffer Overflow Vim Suse Red Hat
8.5
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
8.5 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.8 HIGH

Local vector because the crafted spell file must be accessible on the victim's system; user interaction required since the victim must open or load the file; no privileges needed for the attacker.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat
7.8 HIGH
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

4
Patch available
Aug 11, 2026 - 17:02 EUVD
Source Code Evidence Fetched
Aug 11, 2026 - 16:10 vuln.today
Analysis Generated
Aug 11, 2026 - 16:10 vuln.today
CVE Published
Aug 11, 2026 - 15:31 cve.org
HIGH 8.5

DescriptionCVE.org

Vim is an open source, command line text editor. Prior to 9.2.0846, set_sofo() in src/spellfile.c reuses sl_sal_first[] without resetting values left by set_sal_first(), so a crafted spell file containing an SN_SAL section before an SN_SOFO section causes under-counted mapping lists and attacker-influenced writes beyond a heap allocation. This issue is fixed in version 9.2.0846.

AnalysisAI

Heap buffer overflow in Vim's spell file parser prior to version 9.2.0846 enables arbitrary code execution when a user opens a maliciously crafted spell file. The flaw lies in set_sofo() reusing the sl_sal_first[] array without resetting values written by set_sal_first(), so a spell file ordering an SN_SAL section before an SN_SOFO section causes under-counted mapping lists and attacker-controlled out-of-bounds heap writes (CWE-122). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malicious .spl file with SN_SAL then SN_SOFO sections
Delivery
Deliver file to victim filesystem via repo, phishing, or shared drive
Exploit
Victim opens Vim file triggering spell file load
Execution
SN_SAL section sets sl_sal_first[] entries to -1
Persist
set_sofo() under-counts mappings, allocates undersized heap buffer
Impact
Out-of-bounds heap write achieves code execution as victim user
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Vulnerability AssessmentAI

Exploitation Exploitation requires a victim running a vulnerable version of Vim (prior to 9.2.0846) to load a crafted spell file. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.5 (AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H) accurately reflects that while impact is severe - full confidentiality, integrity, and availability compromise of the vulnerable system - exploitation requires local file delivery and passive user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious Vim spell file containing an SN_SAL section followed by an SN_SOFO section whose multi-byte 'from' entries share a low byte, designed to trigger the under-count condition and write controlled data beyond the heap allocation. The spell file is delivered to the target via a poisoned repository, documentation archive, or shared network drive, and the victim opens a file that causes Vim to load the crafted .spl (for example, by setting spelllang to a language pointing to the malicious file). …
Remediation Upgrade Vim to version 9.2.0846 or later; this is the vendor-released patch confirmed by the official release tag at https://github.com/vim/vim/releases/tag/v9.2.0846 and the fixing commit at https://github.com/vim/vim/commit/05c41c922309c7a11b6ec2f124be66551c90d66a. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, audit Vim installations across your environment, document which systems have spell file auto-loading enabled, and issue a security notice to users advising against opening spell files from untrusted sources. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Same weakness CWE-122 – Heap-based Buffer Overflow

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CVE-2023-27997 CRITICAL
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CVE-2024-30085 HIGH POC
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Same technique Heap Overflow

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CVE-2023-27997 CRITICAL
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CVE-2025-5419 HIGH POC
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CVE-2026-53362 HIGH POC
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CVE-2025-21418 HIGH
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CVE-2023-23376 HIGH
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SUSE

Severity: Important
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EUVD-2026-56226 vulnerability details – vuln.today
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