CVE-2023-52528

Network-service interruption via short USB register read

Published Mar 2, 2024 · Updated May 11, 2026

Use of an uninitialized value in the Linux kernel smsc75xx USB network driver allows local users to interrupt network service. When usbnet_read_cmd returns fewer than four requested bytes, __smsc75xx_read_reg treats the short read as success and leaves buf partly uninitialized for smsc75xx_wait_ready. Triggering occurs while the driver binds to an SMSC LAN75xx USB Ethernet device; the published record reports availability impact but no data access or code execution.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized value in the Linux kernel smsc75xx USB network driver allows local users to interrupt network service. When usbnet_read_cmd returns fewer than four requested bytes, __smsc75xx_read_reg treats the short read as success and leaves buf partly uninitialized for smsc75xx_wait_ready. Triggering occurs while the driver binds to an SMSC LAN75xx USB Ethernet device; the published record reports availability impact but no data access or code execution.

The record

CVE
CVE-2023-52528
Published
Mar 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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.

  1. Affected versionversion=2.6.34
  2. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <2a36d9e2995c8c3c3f179aab1215a69cff06cbed
  3. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <30bc4d7aebe33904b0f2d3aad4b4a9c6029ad0c5
  4. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <310f1c92f65ad905b7e81fe14de82d979ebbd825
  5. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <3e0af6eec1789fd11934164a7f4dbcad979855a4
  6. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <4931e80da9463b03bfe42be54a9a19f213b0f76d
  7. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <9ffc5018020fe646795a8dc1203224b8f776dc09
  8. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <cda10784a176d7192f08ecb518f777a4e9575812
  9. Affected versionversion=d0cad871703b898a442e4049c532ec39168e5b57 <e9c65989920f7c28775ec4e0c11b483910fb67b8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=d0cad871703b898a442e4049c532ec39168e5b57 <2a36d9e2995c8c3c3f179aab1215a69cff06cbed; version=d0cad871703b898a442e4049c532ec39168e5b57 <30bc4d7aebe33904b0f2d3aad4b4a9c6029ad0c5; version=d0cad871703b898a442e4049c532ec39168e5b57 <310f1c92f65ad905b7e81fe14de82d979ebbd825; version=d0cad871703b898a442e4049c532ec39168e5b57 <3e0af6eec1789fd11934164a7f4dbcad979855a4; version=d0cad871703b898a442e4049c532ec39168e5b57 <4931e80da9463b03bfe42be54a9a19f213b0f76d; version=d0cad871703b898a442e4049c532ec39168e5b57 <9ffc5018020fe646795a8dc1203224b8f776dc09; version=d0cad871703b898a442e4049c532ec39168e5b57 <cda10784a176d7192f08ecb518f777a4e9575812; version=d0cad871703b898a442e4049c532ec39168e5b57 <e9c65989920f7c28775ec4e0c11b483910fb67b8

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource

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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