CVE-2023-1382

Local system crash via TIPC connection race

Published Apr 19, 2023 · Updated Mar 19, 2025

NULL pointer dereference in the Linux kernel before 6.1-rc7 allows local users to crash the system through the TIPC protocol. In net/tipc/topsrv.c, tipc_conn_close can observe a newly allocated connection before con->sock is assigned, then dereference con->sock->sk. Reaching the fault requires low-privileged local access, a loaded TIPC module, and winning the data race; the bounded consequence is a system crash.

CVSS severity4.7
Medium
EPSS probability0.19%
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 before 6.1-rc7 allows local users to crash the system through the TIPC protocol. In net/tipc/topsrv.c, tipc_conn_close can observe a newly allocated connection before con->sock is assigned, then dereference con->sock->sk. Reaching the fault requires low-privileged local access, a loaded TIPC module, and winning the data race; the bounded consequence is a system crash.

The record

CVE
CVE-2023-1382
Published
Apr 19, 2023
Updated
Mar 19, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Linux Kernel prior to Kernel 6.1 RC7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux Kernel prior to Kernel 6.1 RC7

Published CVSS scores

4.7NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5SUSECVSS:3.1/AV:N/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
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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