CVE-2023-52941

Local service interruption via conflated ISO-TP timer

Published Mar 27, 2025 · Updated May 23, 2026

Race condition in the CAN ISO-TP transmit path in Linux 6.0.9 through 6.1.10 allows local users to trigger a kernel warning. The txtimer callback handles both consecutive-frame pacing and flow-control or echo timeouts, permitting inconsistent transmit-state transitions around isotp_rcv_echo. Low-privileged local access and CAN ISO-TP traffic are required; systems configured with panic_on_warn convert the warning into a kernel panic.

CVSS severity5.5
Medium
EPSS probability0.21%
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 CAN ISO-TP transmit path in Linux 6.0.9 through 6.1.10 allows local users to trigger a kernel warning. The txtimer callback handles both consecutive-frame pacing and flow-control or echo timeouts, permitting inconsistent transmit-state transitions around isotp_rcv_echo. Low-privileged local access and CAN ISO-TP traffic are required; systems configured with panic_on_warn convert the warning into a kernel panic.

The record

CVE
CVE-2023-52941
Published
Mar 27, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-366, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=3cb476cf834edca47f4470c276feb0f519401fb7
  2. Affected versionversion=6.0.9 <6.1
  3. Affected versionversion=6.1
  4. Affected versionversion=866337865f3747c68a3e7bb837611e39cec1ecd6 <4f027cba8216f42a18b544842efab134f8b1f9f4
  5. Affected versionversion=866337865f3747c68a3e7bb837611e39cec1ecd6 <cae4c9bc35f72af5d4a079bb9d9fd62c4088a411

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3cb476cf834edca47f4470c276feb0f519401fb7; version=6.0.9 <6.1; version=6.1; version=866337865f3747c68a3e7bb837611e39cec1ecd6 <4f027cba8216f42a18b544842efab134f8b1f9f4; version=866337865f3747c68a3e7bb837611e39cec1ecd6 <cae4c9bc35f72af5d4a079bb9d9fd62c4088a411

Published CVSS scores

5.5NVDCVSS: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-366Race Condition within a Thread
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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