CVE-2026-72242Network attack vector

Unauthenticated system crash via SCTP ASCONF handling

Published Aug 15, 2026 · Updated Aug 15, 2026

NULL pointer dereference in the Linux kernel SELinux module allows remote attackers to crash affected systems via SCTP ASCONF traffic. selinux_sctp_bind_connect() dereferences sk->sk_socket without a file reference when sctp_process_asconf invokes the hook from the ASCONF softirq path. Exploitation requires SELinux and SCTP ASCONF processing; the documented consequence is system interruption rather than data access or modification.

CVSS severity7.5
High
EPSS probability0.68%
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 the Linux kernel SELinux module allows remote attackers to crash affected systems via SCTP ASCONF traffic. selinux_sctp_bind_connect() dereferences sk->sk_socket without a file reference when sctp_process_asconf invokes the hook from the ASCONF softirq path. Exploitation requires SELinux and SCTP ASCONF processing; the documented consequence is system interruption rather than data access or modification.

The record

CVE
CVE-2026-72242
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4.17
  2. Affected versionversion=d452930fd3b9031e59abfeddb2fa383f1403d61a <37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb
  3. Affected versionversion=d452930fd3b9031e59abfeddb2fa383f1403d61a <56acfeb10019e200ab6787d01f8d7cbe0f01526f
  4. Affected versionversion=d452930fd3b9031e59abfeddb2fa383f1403d61a <5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4
  5. Affected versionversion=d452930fd3b9031e59abfeddb2fa383f1403d61a <cc8bd47b35eca82393cbad08b1cc86f02e034439
  6. Affected versionversion=d452930fd3b9031e59abfeddb2fa383f1403d61a <d61a80b17254be7230bc5544f8e62ddf21ab38e2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=d452930fd3b9031e59abfeddb2fa383f1403d61a <37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb; version=d452930fd3b9031e59abfeddb2fa383f1403d61a <56acfeb10019e200ab6787d01f8d7cbe0f01526f; version=d452930fd3b9031e59abfeddb2fa383f1403d61a <5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4; version=d452930fd3b9031e59abfeddb2fa383f1403d61a <cc8bd47b35eca82393cbad08b1cc86f02e034439; version=d452930fd3b9031e59abfeddb2fa383f1403d61a <d61a80b17254be7230bc5544f8e62ddf21ab38e2

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.0OracleCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
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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