CVE-2022-49682

Local availability loss via device-node refcount leak

Published Feb 26, 2025 · Updated May 11, 2026

Resource leak in affected Linux kernel branches allows local users to cause availability loss on Xtensa systems during CPU setup. During CPU-counter calibration in arch/xtensa/kernel/time.c, calibrate_ccount obtains a refcounted device-tree node through of_find_compatible_node but does not release it with of_node_put after use. The path requires an Xtensa kernel built with device-tree CPU-clock calibration and runs during boot; no network reachability or data impact 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 affected Linux kernel branches allows local users to cause availability loss on Xtensa systems during CPU setup. During CPU-counter calibration in arch/xtensa/kernel/time.c, calibrate_ccount obtains a refcounted device-tree node through of_find_compatible_node but does not release it with of_node_put after use. The path requires an Xtensa kernel built with device-tree CPU-clock calibration and runs during boot; no network reachability or data impact is reported.

The record

CVE
CVE-2022-49682
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <0dcc1dd8a5dd9240639f1051dfaa2dffc9fbbde5
  2. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <0e403a383c14b63c86bd9df085b7e573e9caee64
  3. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <3e5eb904d9ba657308fc75a5de434b0e58dcb8d7
  4. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <7de4502af68f4f3932f450157f5483eb7b33cb74
  5. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <a0117dc956429f2ede17b323046e1968d1849150
  6. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <af0ff2da01521144bc11194f4c26485d7c9cee73
  7. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <e5234a9d64a976abd134a14710dcd5188158a7c5
  8. Affected versionversion=205ad548a7426fb6813760cd9917d3fc24122576 <f1eaf4ba5372ad111f687a80c67e270708e14c23
  9. Affected versionversion=4.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=205ad548a7426fb6813760cd9917d3fc24122576 <0dcc1dd8a5dd9240639f1051dfaa2dffc9fbbde5; version=205ad548a7426fb6813760cd9917d3fc24122576 <0e403a383c14b63c86bd9df085b7e573e9caee64; version=205ad548a7426fb6813760cd9917d3fc24122576 <3e5eb904d9ba657308fc75a5de434b0e58dcb8d7; version=205ad548a7426fb6813760cd9917d3fc24122576 <7de4502af68f4f3932f450157f5483eb7b33cb74; version=205ad548a7426fb6813760cd9917d3fc24122576 <a0117dc956429f2ede17b323046e1968d1849150; version=205ad548a7426fb6813760cd9917d3fc24122576 <af0ff2da01521144bc11194f4c26485d7c9cee73; version=205ad548a7426fb6813760cd9917d3fc24122576 <e5234a9d64a976abd134a14710dcd5188158a7c5; version=205ad548a7426fb6813760cd9917d3fc24122576 <f1eaf4ba5372ad111f687a80c67e270708e14c23; version=4.9

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

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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

No sourced classifications are available.

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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