CVE-2023-32269

Local system crash via connected-socket accept race

Published May 5, 2023 · Updated May 5, 2025

Use-after-free in the Linux kernel before 6.1.11 allows local users to crash the system through AF_NETROM sockets. nr_listen accepts a connected socket, letting nr_accept return a child that shares the parent's sock; racing socket closures then free that object before nr_release calls sock_hold on it. Exploitation requires NET/ROM routing to be configured or CAP_NET_ADMIN in the initial namespace, and successful abuse interrupts the system by crashing it.

CVSS severity6.7
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel before 6.1.11 allows local users to crash the system through AF_NETROM sockets. nr_listen accepts a connected socket, letting nr_accept return a child that shares the parent's sock; racing socket closures then free that object before nr_release calls sock_hold on it. Exploitation requires NET/ROM routing to be configured or CAP_NET_ADMIN in the initial namespace, and successful abuse interrupts the system by crashing it.

The record

CVE
CVE-2023-32269
Published
May 5, 2023
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 5, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7NVDCVSS:3.1/AV:L/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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