CVE-2022-50463

Service interruption via leaked LPBFIFO interrupt allocation

Published Oct 1, 2025 · Updated Oct 1, 2025

Resource leak in the Linux kernel allows local users to interrupt service through a PowerPC MPC52xx LPBFIFO probe failure. The probe error path requests an IRQ but returns without calling free_irq(), leaving the interrupt allocation behind. Reachability requires a PowerPC 52xx system that loads the LPBFIFO driver and encounters the probe error path, with availability as the only reported impact.

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

What happened

Resource leak in the Linux kernel allows local users to interrupt service through a PowerPC MPC52xx LPBFIFO probe failure. The probe error path requests an IRQ but returns without calling free_irq(), leaving the interrupt allocation behind. Reachability requires a PowerPC 52xx system that loads the LPBFIFO driver and encounters the probe error path, with availability as the only reported impact.

The record

CVE
CVE-2022-50463
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=2.6.33
  2. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <0accd460dc7bbe5f55e41a8867c63db9d07b3ec8
  3. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <40b4be399e0db7073dec5a0de5ca9994f7e31e58
  4. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <5836947613ef33d311b4eff6a32d019580a214f5
  5. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <9bf842ffdd216b9f94d5b051b5d8b815f2426538
  6. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <be9caf2c936f15a9c3f9111e62bdde6357312f90
  7. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <cbda93665a3857324f5c79e45769a83c78183199
  8. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <e4002f293e5b44e57d2930513cca0dff32249812
  9. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <f4ad0a7f0e78d65d38921ab2bef234e49be78b10
  10. Affected versionversion=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <fb3ef6a5af4b003502c940ea50c0f55b06ebbfc9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.33; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <0accd460dc7bbe5f55e41a8867c63db9d07b3ec8; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <40b4be399e0db7073dec5a0de5ca9994f7e31e58; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <5836947613ef33d311b4eff6a32d019580a214f5; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <9bf842ffdd216b9f94d5b051b5d8b815f2426538; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <be9caf2c936f15a9c3f9111e62bdde6357312f90; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <cbda93665a3857324f5c79e45769a83c78183199; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <e4002f293e5b44e57d2930513cca0dff32249812; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <f4ad0a7f0e78d65d38921ab2bef234e49be78b10; version=3c9059d79f5eea6b8b75ddac97693127c3c41db4 <fb3ef6a5af4b003502c940ea50c0f55b06ebbfc9

Published CVSS scores

5.5NVDCVSS: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-401Missing Release of Memory after Effective Lifetime
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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