Local code execution via stack buffer overflow
Published Aug 20, 2026 · Updated Aug 20, 2026
Stack-based buffer overflow in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 allows local users to execute arbitrary code. The affected bos.mp64 fileset writes beyond a stack buffer, but IBM has not disclosed the specific routine, input, or malformed-data path. Exploitation requires local high-privilege access and runs attacker-controlled code with the vulnerable process's authority.
Summary
What happened
Stack-based buffer overflow in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 allows local users to execute arbitrary code. The affected bos.mp64 fileset writes beyond a stack buffer, but IBM has not disclosed the specific routine, input, or malformed-data path. Exploitation requires local high-privilege access and runs attacker-controlled code with the vulnerable process's authority.
The record
- CVE
- CVE-2026-16944
- Published
- Aug 20, 2026
- Updated
- Aug 20, 2026
- Vendor
- IBM
- Product
- AIX
- Classifications
- CWE-787
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 20, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7.2
- Affected versionversion=7.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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