CVE-2025-38458

Local system crash via missing ATM send method

Published Jul 25, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel ATM CLIP subsystem allows local users to crash the system through an ATM socket. In vcc_sendmsg(), the kernel calls the selected device operation's send method even when atmarpd_dev_ops does not implement it. A low-privileged local user able to send through the affected ATM CLIP socket can dereference the null function pointer, producing a kernel oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.17%
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 ATM CLIP subsystem allows local users to crash the system through an ATM socket. In vcc_sendmsg(), the kernel calls the selected device operation's send method even when atmarpd_dev_ops does not implement it. A low-privileged local user able to send through the affected ATM CLIP socket can dereference the null function pointer, producing a kernel oops and service interruption.

The record

CVE
CVE-2025-38458
Published
Jul 25, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07b585ae3699c0a5026f86ac846f144e34875eee
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <22fc46cea91df3dce140a7dc6847c6fcf0354505
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27b5bb7ea1a8fa7b8c4cfde4d2bf8650cca2e8e8
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <34a09d6240a25185ef6fc5a19dbb3cdbb6a78bc0
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f1cad84ac1a6af42d9d57e879de47ce37995024
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f8a9b396037daae453a108faec5b28886361323
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9ec7e943aee5c28c173933f9defd40892fb3be3d
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a16fbe6087e91c8e7c4aa50e1af7ad56edbd9e3e
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07b585ae3699c0a5026f86ac846f144e34875eee; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <22fc46cea91df3dce140a7dc6847c6fcf0354505; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27b5bb7ea1a8fa7b8c4cfde4d2bf8650cca2e8e8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <34a09d6240a25185ef6fc5a19dbb3cdbb6a78bc0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f1cad84ac1a6af42d9d57e879de47ce37995024; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f8a9b396037daae453a108faec5b28886361323; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9ec7e943aee5c28c173933f9defd40892fb3be3d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a16fbe6087e91c8e7c4aa50e1af7ad56edbd9e3e; version=2.6.12

Published CVSS scores

5.5UbuntuCVSS: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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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