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CVE Record

CVE-2022-25478: Vulnerability in Realtek RtsPer driver for PCIe Card Reader (RtsPer.sys) before 10.0.22000.21355 and Realte...

Vulnerability in Realtek RtsPer driver for PCIe Card Reader (RtsPer.sys) before 10.0.22000.21355 and Realtek RtsUer driver for USB Card Reader (RtsUer.sys) before 10.0.22000.31274 provides read and write access to the PCI configuration space of the device.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects Realtek card-reader drivers on Windows. A local, low-privileged user could use vulnerable driver behavior to read or write PCI device configuration data. That can undermine confidentiality, integrity, and availability on an affected endpoint. It is not listed in CISA KEV, and the provided sources do not prove active exploitation.

Executive priority

Prioritize remediation in normal high-severity endpoint patch cycles, especially on shared workstations, kiosks, and developer systems. This is not a confirmed active-exploitation emergency from the provided sources, but vulnerable kernel drivers can create serious endpoint compromise risk after initial local access.

Technical view

CVE-2022-25478 covers Realtek RtsPer.sys before 10.0.22000.21355 and RtsUer.sys before 10.0.22000.31274. The drivers provide read/write access to PCI configuration space. CVSS 3.1 is 7.8: local attack vector, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.

Likely exposure

Windows endpoints using Realtek PCIe Card Reader or USB Card Reader drivers below the fixed versions are the likely exposure. The CVE record does not provide CPEs or a complete affected product matrix, so inventory must be based on driver presence and version.

Exploitation context

Attack requires local access with low privileges. The provided sources do not show remote exploitation and CISA KEV status is false. Public researcher references exist, so treat this as a practical local privilege or system-impact risk where vulnerable drivers are installed.

Researcher notes

The CVE record lists no CWE and no detailed CPEs. The core issue is excessive PCI configuration space access through Realtek card-reader drivers. Realtek’s advisory supplies fixed driver versions. Researcher links are public references, but this analysis avoids exploit procedure details.

Mitigation direction

  • Update RtsPer.sys to 10.0.22000.21355 or later.
  • Update RtsUer.sys to 10.0.22000.31274 or later.
  • Use Realtek or OEM-approved driver packages only.
  • If updates are unavailable, check vendor guidance for compensating controls.
  • Prioritize managed endpoints where untrusted local users can run code.

Validation and detection

  • Inventory endpoints for RtsPer.sys and RtsUer.sys.
  • Compare installed driver versions against the fixed version thresholds.
  • Confirm updates came from Realtek, Microsoft, or the device OEM.
  • Review security telemetry for unexpected loading of these drivers.
  • Track unresolved systems as local privilege exposure until updated.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-25478 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
2ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2022-25478Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.