CVE-2025-22103

Kernel crash via IPvlan L3S teardown race

Published Apr 16, 2025 · Updated May 11, 2026

A NULL pointer dereference in Linux IPvlan L3S teardown allows local users to crash the kernel during concurrent packet receipt. The l3mdev_l3_rcv() path retains a master device after checking its flags, while ipvlan_l3s_unregister() can clear that device's l3mdev_ops pointer before the receive path dereferences it. Triggering the race requires local access with authority to delete an L3S IPvlan interface while traffic reaches its master; the resulting NULL dereference interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in Linux IPvlan L3S teardown allows local users to crash the kernel during concurrent packet receipt. The l3mdev_l3_rcv() path retains a master device after checking its flags, while ipvlan_l3s_unregister() can clear that device's l3mdev_ops pointer before the receive path dereferences it. Triggering the race requires local access with authority to delete an L3S IPvlan interface while traffic reaches its master; the resulting NULL dereference interrupts the host.

The record

CVE
CVE-2025-22103
Published
Apr 16, 2025
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. Apr 16, 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=5.1
  2. Affected versionversion=c675e06a98a474f7ad0af32ce467613da818da52 <0032c99e83b9ce6d5995d65900aa4b6ffb501cce
  3. Affected versionversion=c675e06a98a474f7ad0af32ce467613da818da52 <52b44d8c653459c658b733d13658afdde45f6836
  4. Affected versionversion=c675e06a98a474f7ad0af32ce467613da818da52 <59599bce44af3df7a215ebc81cb166426e1c9204
  5. Affected versionversion=c675e06a98a474f7ad0af32ce467613da818da52 <f9dff65140efc289f01bcf39c3ca66a8806b6132

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=c675e06a98a474f7ad0af32ce467613da818da52 <0032c99e83b9ce6d5995d65900aa4b6ffb501cce; version=c675e06a98a474f7ad0af32ce467613da818da52 <52b44d8c653459c658b733d13658afdde45f6836; version=c675e06a98a474f7ad0af32ce467613da818da52 <59599bce44af3df7a215ebc81cb166426e1c9204; version=c675e06a98a474f7ad0af32ce467613da818da52 <f9dff65140efc289f01bcf39c3ca66a8806b6132

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-476NULL Pointer Dereference
T1499.004Application 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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