CVE-2022-49847

Kernel crash via premature phylink cleanup

Published May 1, 2025 · Updated May 11, 2026

Denial of service in the Linux kernel AM65 CPSW Ethernet driver 5.18 through 6.1-rc3 allows local users to crash the kernel. In am65_cpsw_nuss_remove(), phylink cleanup ran before network-device cleanup, leaving am65_cpsw_nuss_ndo_slave_stop() to dereference an invalid phylink. Triggering the fault requires local module-removal privileges, the TI AM65 CPSW driver, and the first slave link to be up; the resulting kernel oops interrupts the host.

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

What happened

Denial of service in the Linux kernel AM65 CPSW Ethernet driver 5.18 through 6.1-rc3 allows local users to crash the kernel. In am65_cpsw_nuss_remove(), phylink cleanup ran before network-device cleanup, leaving am65_cpsw_nuss_ndo_slave_stop() to dereference an invalid phylink. Triggering the fault requires local module-removal privileges, the TI AM65 CPSW driver, and the first slave link to be up; the resulting kernel oops interrupts the host.

The record

CVE
CVE-2022-49847
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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

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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=5.18
  2. Affected versionversion=e8609e69470f369509b44d5f2619f94541fe9df6 <1a0c016a4831ea29be09bbc8162d4a2a0690b4b8
  3. Affected versionversion=e8609e69470f369509b44d5f2619f94541fe9df6 <442fd1bfe599bc54d118775e9e1a4fe913e4b369

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=e8609e69470f369509b44d5f2619f94541fe9df6 <1a0c016a4831ea29be09bbc8162d4a2a0690b4b8; version=e8609e69470f369509b44d5f2619f94541fe9df6 <442fd1bfe599bc54d118775e9e1a4fe913e4b369

Published CVSS scores

5.5UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499Endpoint Denial of Service

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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