CVE-2025-0986

Undetected data corruption via accelerated gzip compression

Published Mar 28, 2025 · Updated Sep 1, 2025

Data corruption in IBM PowerVM Hypervisor FW1050.00 through FW1050.30 and FW1060.00 through FW1060.20 allows local users to lose data. The hypervisor's NX gzip acceleration path produces incorrect compression output without detecting it during a specific hardware state window. Exploitation requires a Power10 Linux partition using a processor compatibility configuration that exposes hardware acceleration, and the affected operation can silently corrupt or lose processed data.

CVSS severity4.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data corruption in IBM PowerVM Hypervisor FW1050.00 through FW1050.30 and FW1060.00 through FW1060.20 allows local users to lose data. The hypervisor's NX gzip acceleration path produces incorrect compression output without detecting it during a specific hardware state window. Exploitation requires a Power10 Linux partition using a processor compatibility configuration that exposes hardware acceleration, and the affected operation can silently corrupt or lose processed data.

The record

CVE
CVE-2025-0986
Published
Mar 28, 2025
Updated
Sep 1, 2025
Vendor
IBM
Product
PowerVM Hypervisor
Classifications
CWE-409, T1565
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2025Record 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.

  1. Affected versionversion=FW1050.00 <=FW1050.30
  2. Affected versionversion=FW1060.00 <=FW1060.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · PowerVM Hypervisorversion=FW1050.00 <=FW1050.30; version=FW1060.00 <=FW1060.20

Published CVSS scores

4.5IBM CorporationCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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