CVE-2020-0548

Local data disclosure via stale vector registers

Published Jan 28, 2020 · Updated Aug 4, 2024

Vector register sampling in some Intel Processors allows local users to infer partial vector data from prior software execution. Under specific microarchitectural conditions, data previously read from vector registers propagates into unused store-buffer portions that MDS or TAA methods can sample. Exploitation requires local low-privileged code on an MDS- or TAA-affected processor and exposes only upper vector-register bits from prior software or a sibling hyperthread.

CVSS severity2.8
Low
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Vector register sampling in some Intel Processors allows local users to infer partial vector data from prior software execution. Under specific microarchitectural conditions, data previously read from vector registers propagates into unused store-buffer portions that MDS or TAA methods can sample. Exploitation requires local low-privileged code on an MDS- or TAA-affected processor and exposes only upper vector-register bits from prior software or a sibling hyperthread.

The record

CVE
CVE-2020-0548
Published
Jan 28, 2020
Updated
Aug 4, 2024
Vendor
Topcon Positioning Systems, Inc.
Product
Intel Processors
Classifications
CWE-404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 28, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=see references

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Topcon Positioning Systems, Inc. · Intel Processorsversion=see references

Published CVSS scores

2.1NIST National Vulnerability DatabaseAV:L/AC:L/Au:N/C:P/I:N/A:N
2.8Intel CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release

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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