CVE-2025-22017

Kernel crash via cyclic allocation error mishandling

Published Apr 8, 2025 · Updated May 11, 2026

NULL pointer dereference in devlink in affected Linux kernel releases allows local users to crash the kernel through resource-ID wraparound. When xa_alloc_cyclic() returns 1 after wrapping, devlink converts it to ERR_PTR(1); IS_ERR() accepts it as valid and rel is dereferenced without allocation. Reachability requires local low-privileged access and cyclic allocator wraparound; the kernel record reports no real-world trigger.

CVSS severity5.5
Medium
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

NULL pointer dereference in devlink in affected Linux kernel releases allows local users to crash the kernel through resource-ID wraparound. When xa_alloc_cyclic() returns 1 after wrapping, devlink converts it to ERR_PTR(1); IS_ERR() accepts it as valid and rel is dereferenced without allocation. Reachability requires local low-privileged access and cyclic allocator wraparound; the kernel record reports no real-world trigger.

The record

CVE
CVE-2025-22017
Published
Apr 8, 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. Apr 8, 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=6.7
  2. Affected versionversion=c137743bce02b18c1537d4681aa515f7b80bf0a8 <466132f6d28a7e47a82501fe1c46b8f90487412e
  3. Affected versionversion=c137743bce02b18c1537d4681aa515f7b80bf0a8 <f3b97b7d4bf316c3991e5634c9f4847c2df35478
  4. Affected versionversion=c137743bce02b18c1537d4681aa515f7b80bf0a8 <f8aaa38cfaf6f20afa4db36b6529032fb69165dc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=c137743bce02b18c1537d4681aa515f7b80bf0a8 <466132f6d28a7e47a82501fe1c46b8f90487412e; version=c137743bce02b18c1537d4681aa515f7b80bf0a8 <f3b97b7d4bf316c3991e5634c9f4847c2df35478; version=c137743bce02b18c1537d4681aa515f7b80bf0a8 <f8aaa38cfaf6f20afa4db36b6529032fb69165dc

Published CVSS scores

5.5NIST NVDCVSS: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
T1499Endpoint Denial of Service

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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