CVE-2022-49621

Local service interruption via unreleased device-tree references

Published Feb 26, 2025 · Updated May 11, 2026

Resource leak in the Linux kernel pmac32-cpufreq driver allows local users to interrupt service through repeated driver initialization. The pmac_cpufreq_init_MacRISC3 function obtains three device-tree node references with of_find_node_by_name but fails to release them with of_node_put. The vulnerable path requires a 32-bit PowerMac MacRISC3 system and local low-privileged access; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.25%
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 pmac32-cpufreq driver allows local users to interrupt service through repeated driver initialization. The pmac_cpufreq_init_MacRISC3 function obtains three device-tree node references with of_find_node_by_name but fails to release them with of_node_put. The vulnerable path requires a 32-bit PowerMac MacRISC3 system and local low-privileged access; no data disclosure or modification is reported.

The record

CVE
CVE-2022-49621
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <37c16fc2cb13a13f3c0193bfc6f2edef7d7df7d7
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3ea9dbf7c2f436952bca331c6f5d72f75aca224e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4513018d0bd739097570d26a7760551cba3deb56
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4585890ab2dbf455d80e254d3d859d4c1e357920
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4f242486bf46d314b2e3838cc64b56f008a3c4d7
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <57289b6601fe78c09921599b042a0b430fb420ec
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8dda30f81c751b01cd71f2cfaeef26ad4393b1d1
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccd7567d4b6cf187fdfa55f003a9e461ee629e36
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <37c16fc2cb13a13f3c0193bfc6f2edef7d7df7d7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3ea9dbf7c2f436952bca331c6f5d72f75aca224e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4513018d0bd739097570d26a7760551cba3deb56; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4585890ab2dbf455d80e254d3d859d4c1e357920; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4f242486bf46d314b2e3838cc64b56f008a3c4d7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <57289b6601fe78c09921599b042a0b430fb420ec; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8dda30f81c751b01cd71f2cfaeef26ad4393b1d1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccd7567d4b6cf187fdfa55f003a9e461ee629e36; 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

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

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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