CVE-2022-48850

Local system crash via stale netdevice access

Published Jul 16, 2024 · Updated May 11, 2026

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system via a concurrent sysfs speed read. The net-sysfs speed_show function calls __ethtool_get_link_ksettings without first verifying that the netdevice remains present, so teardown can leave the driver path dereferencing removed device state. Triggering the panic requires local access to read a network interface's speed attribute while that interface is being removed or the system is shutting down.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system via a concurrent sysfs speed read. The net-sysfs speed_show function calls __ethtool_get_link_ksettings without first verifying that the netdevice remains present, so teardown can leave the driver path dereferencing removed device state. Triggering the panic requires local access to read a network interface's speed attribute while that interface is being removed or the system is shutting down.

The record

CVE
CVE-2022-48850
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 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=2.6.33
  2. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <081369ad088a76429984483b8a5f7e967a125aad
  3. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <3a79f380b3e10edf6caa9aac90163a5d7a282204
  4. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <4224cfd7fb6523f7a9d1c8bb91bb5df1e38eb624
  5. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <75fc8363227a999e8f3d17e2eb28dce5600dcd3f
  6. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <8879b5313e9fa5e0c6d6812a0d25d83aed0110e2
  7. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <8d5e69d8fbf3a35ab4fbe56b8f092802b43f3ef6
  8. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <a7b9ab04c5932dee7ec95e0abc58b0df350c0dd2
  9. Affected versionversion=d519e17e2d01a0ee9abe083019532061b4438065 <d15c9f6e3335002fea1c33bc8f71a705fa96976c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.33; version=d519e17e2d01a0ee9abe083019532061b4438065 <081369ad088a76429984483b8a5f7e967a125aad; version=d519e17e2d01a0ee9abe083019532061b4438065 <3a79f380b3e10edf6caa9aac90163a5d7a282204; version=d519e17e2d01a0ee9abe083019532061b4438065 <4224cfd7fb6523f7a9d1c8bb91bb5df1e38eb624; version=d519e17e2d01a0ee9abe083019532061b4438065 <75fc8363227a999e8f3d17e2eb28dce5600dcd3f; version=d519e17e2d01a0ee9abe083019532061b4438065 <8879b5313e9fa5e0c6d6812a0d25d83aed0110e2; version=d519e17e2d01a0ee9abe083019532061b4438065 <8d5e69d8fbf3a35ab4fbe56b8f092802b43f3ef6; version=d519e17e2d01a0ee9abe083019532061b4438065 <a7b9ab04c5932dee7ec95e0abc58b0df350c0dd2; version=d519e17e2d01a0ee9abe083019532061b4438065 <d15c9f6e3335002fea1c33bc8f71a705fa96976c

Published CVSS scores

5.5NISTCVSS: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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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