CVE-2023-53062

Kernel-memory disclosure via oversized receive descriptor

Published May 2, 2025 · Updated May 11, 2026

Information disclosure in the Linux kernel's SMSC95xx USB Ethernet driver allows attackers to expose kernel memory via received data. In smsc95xx_rx_fixup, the driver trusts the packet length encoded in an RX descriptor and clones data beyond the remaining skb length. Exposure requires the smsc95xx receive path and an oversized descriptor; public sources do not establish attacker positioning.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux kernel's SMSC95xx USB Ethernet driver allows attackers to expose kernel memory via received data. In smsc95xx_rx_fixup, the driver trusts the packet length encoded in an RX descriptor and clones data beyond the remaining skb length. Exposure requires the smsc95xx receive path and an oversized descriptor; public sources do not establish attacker positioning.

The record

CVE
CVE-2023-53062
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 2, 2025CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.28
  2. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <33d1603a38e05886c538129ddfe00bd52d347e7b
  3. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <70eb25c6a6cde149affe8a587371a3a8ad295ba0
  4. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <733580e268a53db1cd01f2251419da91866378f6
  5. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <ba6c40227108f8ee428e42eb0337b48ed3001e65
  6. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <d3c145a4d24b752c9a1314d5a595014d51471418
  7. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <e041bef1adee02999cf24f9a2e15ed452bc363fe
  8. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <f2111c791d885211714db85f9a06188571c57dd0
  9. Affected versionversion=2f7ca802bdae2ca41022618391c70c2876d92190 <ff821092cf02a70c2bccd2d19269f01e29aa52cf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.28; version=2f7ca802bdae2ca41022618391c70c2876d92190 <33d1603a38e05886c538129ddfe00bd52d347e7b; version=2f7ca802bdae2ca41022618391c70c2876d92190 <70eb25c6a6cde149affe8a587371a3a8ad295ba0; version=2f7ca802bdae2ca41022618391c70c2876d92190 <733580e268a53db1cd01f2251419da91866378f6; version=2f7ca802bdae2ca41022618391c70c2876d92190 <ba6c40227108f8ee428e42eb0337b48ed3001e65; version=2f7ca802bdae2ca41022618391c70c2876d92190 <d3c145a4d24b752c9a1314d5a595014d51471418; version=2f7ca802bdae2ca41022618391c70c2876d92190 <e041bef1adee02999cf24f9a2e15ed452bc363fe; version=2f7ca802bdae2ca41022618391c70c2876d92190 <f2111c791d885211714db85f9a06188571c57dd0; version=2f7ca802bdae2ca41022618391c70c2876d92190 <ff821092cf02a70c2bccd2d19269f01e29aa52cf

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime

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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