CVE-2022-50025

Local service interruption via leaked IRQ bitmap

Published Jun 18, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel CXL driver allows local users to exhaust kernel memory during failed IRQ allocation. The afu_allocate_irqs error path releases IRQ ranges and names but fails to free the bitmap allocated by bitmap_zalloc. Exploitation requires low-privilege local access and a CXL AFU IRQ allocation failure; repeated failures exhaust memory and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel CXL driver allows local users to exhaust kernel memory during failed IRQ allocation. The afu_allocate_irqs error path releases IRQ ranges and names but fails to free the bitmap allocated by bitmap_zalloc. Exploitation requires low-privilege local access and a CXL AFU IRQ allocation failure; repeated failures exhaust memory and interrupt service.

The record

CVE
CVE-2022-50025
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=3.19
  2. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <3a15b45b5454da862376b5d69a4967f5c6fa1368
  3. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <4be138bcd6d68cec0ce47051b117541061f5141a
  4. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <6544ff559315498ad6c0a311359ca44987f9ca07
  5. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <695af60af755873399ce01cb97176768828bc1fd
  6. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <89d51dc6878c47b6400922fac21b6a33f9d1a588
  7. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <addff638c41753639368c252d0c5ba0d8fe9ed97
  8. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <c2557780ee7818b701681c226fa4cb7c0b171665
  9. Affected versionversion=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <c2c7a29f99788e9e5dfe41d16868ea33da7cc235

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.19; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <3a15b45b5454da862376b5d69a4967f5c6fa1368; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <4be138bcd6d68cec0ce47051b117541061f5141a; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <6544ff559315498ad6c0a311359ca44987f9ca07; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <695af60af755873399ce01cb97176768828bc1fd; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <89d51dc6878c47b6400922fac21b6a33f9d1a588; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <addff638c41753639368c252d0c5ba0d8fe9ed97; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <c2557780ee7818b701681c226fa4cb7c0b171665; version=80fa93fce37d3490f4bb0da8a5b239a6745bc744 <c2c7a29f99788e9e5dfe41d16868ea33da7cc235

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

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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-401Missing Release of Memory after Effective Lifetime
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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