CVE-2026-72124

CAN transfer corruption via unsynchronized TX state

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in the Linux kernel ISO-TP module allows physically proximate attackers to corrupt CAN data transfers with timed frames. The net/can/isotp.c TX state machine mixes a lock-free sendmsg() claim with timer cancellation under so->rx_lock, allowing frame or timer callbacks to act on stale transfer state. Exploitation requires concurrent ISO-TP transmission and Flow Control or echo activity on the same CAN segment; the bounded result is corruption of an unrelated transfer.

CVSS severity8.8
High
EPSS probability0.35%
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 Linux kernel ISO-TP module allows physically proximate attackers to corrupt CAN data transfers with timed frames. The net/can/isotp.c TX state machine mixes a lock-free sendmsg() claim with timer cancellation under so->rx_lock, allowing frame or timer callbacks to act on stale transfer state. Exploitation requires concurrent ISO-TP transmission and Flow Control or echo activity on the same CAN segment; the bounded result is corruption of an unrelated transfer.

The record

CVE
CVE-2026-72124
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-367, T1565.002
Attack vector
adjacent
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=5.10
  2. Affected versionversion=e057dd3fc20ffb3d7f150af46542a51b59b90127 <0b05eca9589f609e2491b528dccf683168a4cda8
  3. Affected versionversion=e057dd3fc20ffb3d7f150af46542a51b59b90127 <37beb16e08cae94cc05840c7274225e3b0b38ae7
  4. Affected versionversion=e057dd3fc20ffb3d7f150af46542a51b59b90127 <4f1fdf1a1c317bcac0c6b6c8e12642c9983de1ca
  5. Affected versionversion=e057dd3fc20ffb3d7f150af46542a51b59b90127 <a7d90e7b5e75d7406c889fe36e9a61ee364a00cb
  6. Affected versionversion=e057dd3fc20ffb3d7f150af46542a51b59b90127 <cf070fe33bfbd1a4c21236078fadb35dd223a157

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=e057dd3fc20ffb3d7f150af46542a51b59b90127 <0b05eca9589f609e2491b528dccf683168a4cda8; version=e057dd3fc20ffb3d7f150af46542a51b59b90127 <37beb16e08cae94cc05840c7274225e3b0b38ae7; version=e057dd3fc20ffb3d7f150af46542a51b59b90127 <4f1fdf1a1c317bcac0c6b6c8e12642c9983de1ca; version=e057dd3fc20ffb3d7f150af46542a51b59b90127 <a7d90e7b5e75d7406c889fe36e9a61ee364a00cb; version=e057dd3fc20ffb3d7f150af46542a51b59b90127 <cf070fe33bfbd1a4c21236078fadb35dd223a157

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.8cve.orgCVSS:3.1/AV:A/AC:L/PR:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1565.002Transmitted Data Manipulation

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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