CVE-2022-48754

Local privilege escalation via post-release PHY reset

Published Jun 20, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel phylib allows local users with CAP_NET_ADMIN to corrupt kernel memory during PHY detachment. In phy_detach(), put_device() can release the final phy_device reference before phy_device_reset() dereferences reset state in that freed object. Local users able to detach a PHY-backed interface can obtain kernel read, write, or control-flow primitives, or crash the host.

CVSS severity8.4
High
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-after-free in Linux kernel phylib allows local users with CAP_NET_ADMIN to corrupt kernel memory during PHY detachment. In phy_detach(), put_device() can release the final phy_device reference before phy_device_reset() dereferences reset state in that freed object. Local users able to detach a PHY-backed interface can obtain kernel read, write, or control-flow primitives, or crash the host.

The record

CVE
CVE-2022-48754
Published
Jun 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.16
  2. Affected versionversion=bafbdd527d569c8200521f2f7579f65a044271be <67d271760b037ce0806d687ee6057edc8afd4205
  3. Affected versionversion=bafbdd527d569c8200521f2f7579f65a044271be <aefaccd19379d6c4620269a162bfb88ff687f289
  4. Affected versionversion=bafbdd527d569c8200521f2f7579f65a044271be <bd024e36f68174b1793906c39ca16cee0c9295c2
  5. Affected versionversion=bafbdd527d569c8200521f2f7579f65a044271be <cb2fab10fc5e7a3aa1bb0a68a3abdcf3e37852af
  6. Affected versionversion=bafbdd527d569c8200521f2f7579f65a044271be <cbda1b16687580d5beee38273f6241ae3725960c
  7. Affected versionversion=bafbdd527d569c8200521f2f7579f65a044271be <f39027cbada43b33566c312e6be3db654ca3ad17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=bafbdd527d569c8200521f2f7579f65a044271be <67d271760b037ce0806d687ee6057edc8afd4205; version=bafbdd527d569c8200521f2f7579f65a044271be <aefaccd19379d6c4620269a162bfb88ff687f289; version=bafbdd527d569c8200521f2f7579f65a044271be <bd024e36f68174b1793906c39ca16cee0c9295c2; version=bafbdd527d569c8200521f2f7579f65a044271be <cb2fab10fc5e7a3aa1bb0a68a3abdcf3e37852af; version=bafbdd527d569c8200521f2f7579f65a044271be <cbda1b16687580d5beee38273f6241ae3725960c; version=bafbdd527d569c8200521f2f7579f65a044271be <f39027cbada43b33566c312e6be3db654ca3ad17
The Linux Kernel Organization · Linux Kernelversion=4.16; version=bafbdd527d56 <67d271760b03; version=bafbdd527d56 <aefaccd19379; version=bafbdd527d56 <bd024e36f681; version=bafbdd527d56 <cb2fab10fc5e; version=bafbdd527d56 <cbda1b166875; version=bafbdd527d56 <f39027cbada4

Published CVSS scores

8.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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