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Back to active CVEs
High · CVSS 8.2CVE-2026-96266

IBM Power Systems Firmware Buffer OverflowCVE-2026-96266

Answer in brief

CVE-2026-96266 records a High severity (CVSS 8.2) vulnerability in IBM Power Systems Firmware Buffer Overflow. The current sources do not mark it as known exploited. The current feed maps IBM/PowerVM Hypervisor (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 12, 2026Updated Oct 13, 2026Source checked Oct 25, 2026First seen by HOL Oct 12, 2026Material review Oct 13, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/PowerVM Hypervisor (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/PowerVM Hypervisorgeneric>=FW1060.00 <=FW1060.81Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/PowerVM Hypervisor.
  2. 2Review the reported fix. Source-reported solution: Customers with the products below should install  FW1060.82(1060_199), or newer to remediate this vulnerability. Power 10 * IBM Power System S1022 (9105-22A) * IBM Power System S1024 (9105-42A) * IBM Power System S1022s (9105-22B) * IBM Power System S1014 (9105-41B) * IBM Power System L1022 (9786-22H) * IBM Power System L1024 (9786-42H) * IBM Power System E1050 (9043-MRX) * IBM Power System S1012 (9028-21B) The images mentioned above can be located at IBM Fix Central : https://www.ibm.com/support/fixcentral/ https://www.ibm.com/support/fixcentral/

Evidence timeline and material changes

  1. Published upstream

    Oct 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 12, 2026

Sources and claim methodology

  • Source referenceibm.com
Upstream source description

IBM Power Systems Firmware FW1060.00 through FW1060.81 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the FSP can write specially crafted configuration data to cause memory corruption in the host firmware boot stage during system IPL, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-121
Source
CVE List V5
Source checked
Oct 25, 2026
References
1 linked source
Open source record