CVE-2025-22018

Kernel crash via missing MPOA cache entry

Published Apr 16, 2025 · Updated May 11, 2026

Null pointer dereference in the Linux kernel ATM MPOA cache allows local users to crash the kernel through a crafted message. MPOA_cache_impos_rcvd() permits both entry and holding_time to be null, then passes the null entry to eg_cache_put(), where entry->use is dereferenced. Low-privileged local access is required, and the demonstrated consequence is a kernel crash rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
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 MPOA cache allows local users to crash the kernel through a crafted message. MPOA_cache_impos_rcvd() permits both entry and holding_time to be null, then passes the null entry to eg_cache_put(), where entry->use is dereferenced. Low-privileged local access is required, and the demonstrated consequence is a kernel crash rather than data disclosure or modification.

The record

CVE
CVE-2025-22018
Published
Apr 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 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 <09691f367df44fe93255274d80a439f9bb3263fc
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ef6e49881b6b50ac454cb9d6501d009fdceb6fc
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14c7aca5ba2740973de27c1bb8df77b4dcb6f775
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1505f9b720656b17865e4166ab002960162bf679
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c23bb2c894e9ef2727682f98c341b20f78c9013
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9da6b6340dbcf0f60ae3ec6a7d6438337c32518a
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ab92f51c7f53a08f1a686bfb80690ebb3672357d
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bf2986fcf82a449441f9ee4335df19be19e83970
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d7f1e4a53a51cc6ba833afcb40439f18dab61c1f
  10. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <09691f367df44fe93255274d80a439f9bb3263fc; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ef6e49881b6b50ac454cb9d6501d009fdceb6fc; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14c7aca5ba2740973de27c1bb8df77b4dcb6f775; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1505f9b720656b17865e4166ab002960162bf679; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c23bb2c894e9ef2727682f98c341b20f78c9013; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9da6b6340dbcf0f60ae3ec6a7d6438337c32518a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ab92f51c7f53a08f1a686bfb80690ebb3672357d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bf2986fcf82a449441f9ee4335df19be19e83970; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d7f1e4a53a51cc6ba833afcb40439f18dab61c1f; version=2.6.12

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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 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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application 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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