Sensitive memory disclosure via undisclosed out-of-bounds read
Published Aug 19, 2026 · Updated Aug 20, 2026
Out-of-bounds read in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 allows local users to read sensitive information from memory. IBM identifies bos.mp64 as affected but has not disclosed the routine, input, or boundary check whose failure reads beyond the intended buffer. Low-privileged local access is required, and the documented consequence is limited to confidentiality with no integrity or availability impact.
Summary
What happened
Out-of-bounds read in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 allows local users to read sensitive information from memory. IBM identifies bos.mp64 as affected but has not disclosed the routine, input, or boundary check whose failure reads beyond the intended buffer. Low-privileged local access is required, and the documented consequence is limited to confidentiality with no integrity or availability impact.
The record
- CVE
- CVE-2026-16891
- Published
- Aug 19, 2026
- Updated
- Aug 20, 2026
- Vendor
- IBM
- Product
- AIX
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 19, 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
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Technologies
Your stack
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Your stack
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