CVE-2025-38147

Local system crash via mismatched socket family

Published Jul 3, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows local users to crash the system by connecting an IPv4 socket to an IPv6 address. netlbl_conn_setattr() trusts the user-supplied sockaddr family without confirming that it matches the socket, then sends an IPv4 socket into CALIPSO IPv6 handling and dereferences a missing ipv6_pinfo. A local account able to invoke connect() is required; exploitation causes a kernel oops and can panic or reboot the host when panic-on-oops behavior is enabled.

CVSS severity5.5
Medium
EPSS probability0.18%
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 allows local users to crash the system by connecting an IPv4 socket to an IPv6 address. netlbl_conn_setattr() trusts the user-supplied sockaddr family without confirming that it matches the socket, then sends an IPv4 socket into CALIPSO IPv6 handling and dereferences a missing ipv6_pinfo. A local account able to invoke connect() is required; exploitation causes a kernel oops and can panic or reboot the host when panic-on-oops behavior is enabled.

The record

CVE
CVE-2025-38147
Published
Jul 3, 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. Jul 3, 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=4.8
  2. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <0c813dbc851dbf418fdc6dc883fd0592d6c555cd
  3. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <26ce90f1ce60b0ff587de8d6aec399aa55cab28e
  4. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <6e9f2df1c550ead7cecb3e450af1105735020c92
  5. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <946bfdfcb76ac2bac5b8526447035885ff41c598
  6. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <c32ebe33626335a536dbbdd09571c06dd9bc1729
  7. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <dd8928897594931d6912ef2f7a43e110b4958d3d
  8. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <e2ec310c7a50271843c585e27ef14e48c66ce649
  9. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <fc2da88411470480b8b7e9177e930cedd893cf56

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=ceba1832b1b2da0149c51de62a847c00bca1677a <0c813dbc851dbf418fdc6dc883fd0592d6c555cd; version=ceba1832b1b2da0149c51de62a847c00bca1677a <26ce90f1ce60b0ff587de8d6aec399aa55cab28e; version=ceba1832b1b2da0149c51de62a847c00bca1677a <6e9f2df1c550ead7cecb3e450af1105735020c92; version=ceba1832b1b2da0149c51de62a847c00bca1677a <946bfdfcb76ac2bac5b8526447035885ff41c598; version=ceba1832b1b2da0149c51de62a847c00bca1677a <c32ebe33626335a536dbbdd09571c06dd9bc1729; version=ceba1832b1b2da0149c51de62a847c00bca1677a <dd8928897594931d6912ef2f7a43e110b4958d3d; version=ceba1832b1b2da0149c51de62a847c00bca1677a <e2ec310c7a50271843c585e27ef14e48c66ce649; version=ceba1832b1b2da0149c51de62a847c00bca1677a <fc2da88411470480b8b7e9177e930cedd893cf56

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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