CVE-2023-54105

Incorrect bind acceptance via unchecked address family

Published Dec 24, 2025 · Updated Dec 24, 2025

Improper input validation in the Linux kernel allows local users to bind an ISO-TP socket with a non-CAN address family. isotp_bind() checks the supplied sockaddr length but, before the fix, does not verify that its can_family field is AF_CAN before accepting the bind. A low-privileged local process can trigger the incorrect acceptance; upstream reports no functional impact beyond failing to return an error for the invalid family.

CVSS severity3.3
Low
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in the Linux kernel allows local users to bind an ISO-TP socket with a non-CAN address family. isotp_bind() checks the supplied sockaddr length but, before the fix, does not verify that its can_family field is AF_CAN before accepting the bind. A low-privileged local process can trigger the incorrect acceptance; upstream reports no functional impact beyond failing to return an error for the invalid family.

The record

CVE
CVE-2023-54105
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2fc6f337257f4f7c21ecff429241f7acaa6df4e8
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9427584c2f153d0677ef3bad6f44028c60d728c4
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6adf659a8ba85913e16a571d5a9bcd17d3d1234
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dd4faace51e41a82a8c0770ee0cc26088f9d9d06
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de3c02383aa678f6799402ac47fdd89cf4bfcaa9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2fc6f337257f4f7c21ecff429241f7acaa6df4e8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9427584c2f153d0677ef3bad6f44028c60d728c4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6adf659a8ba85913e16a571d5a9bcd17d3d1234; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dd4faace51e41a82a8c0770ee0cc26088f9d9d06; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de3c02383aa678f6799402ac47fdd89cf4bfcaa9

Published CVSS scores

3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5Amazon LinuxCVSS: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 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

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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