CVE-2022-49664Network attack vector

Kernel crash via TIPC broadcast-link race

Published Feb 26, 2025 · Updated Aug 5, 2026

Race condition in the TIPC subsystem of affected Linux kernels allows remote attackers to crash the kernel with concurrent TIPC-over-UDP packets. tipc_node_create publishes a new node in the hash table before allocating its broadcast link, so tipc_bcast_rcv can retrieve the node and dereference a NULL link. A TIPC bearer must be enabled and overlapping discovery and broadcast packets must win the initialization race; the resulting kernel oops or panic interrupts the host.

CVSS severity7.5
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the TIPC subsystem of affected Linux kernels allows remote attackers to crash the kernel with concurrent TIPC-over-UDP packets. tipc_node_create publishes a new node in the hash table before allocating its broadcast link, so tipc_bcast_rcv can retrieve the node and dereference a NULL link. A TIPC bearer must be enabled and overlapping discovery and broadcast packets must win the initialization race; the resulting kernel oops or panic interrupts the host.

The record

CVE
CVE-2022-49664
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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=0b8f0026bbd4df1688e1726026476e60762daf2a
  2. Affected versionversion=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <35fcb2ba35b4d9b592b558c3bcc6e0d90e213588
  3. Affected versionversion=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <456bc338871c4a52117dd5ef29cce3745456d248
  4. Affected versionversion=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <cb8092d70a6f5f01ec1490fce4d35efed3ed996c
  5. Affected versionversion=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <e52910e671f58c619e33dac476b11b35e2d3ab6f
  6. Affected versionversion=5.4.287 <5.5
  7. Affected versionversion=5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0b8f0026bbd4df1688e1726026476e60762daf2a; version=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <35fcb2ba35b4d9b592b558c3bcc6e0d90e213588; version=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <456bc338871c4a52117dd5ef29cce3745456d248; version=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <cb8092d70a6f5f01ec1490fce4d35efed3ed996c; version=4cbf8ac2fe5a0846508fe02b95a5de1a90fa73f4 <e52910e671f58c619e33dac476b11b35e2d3ab6f; version=5.4.287 <5.5; version=5.5

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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