CVE-2022-50155

Local service interruption via device-node refcount leak

Published Jun 18, 2025 · Updated May 11, 2026

Reference-count leak in the BCM4908 MTD partition parser in Linux allows local users to interrupt service through repeated parser execution. The bcm4908_partitions_fw_offset function acquires the root device-tree node with of_find_node_by_path but omits of_node_put on every return path, retaining a reference each time the parser runs. Reachability requires BCM4908 firmware-partition parsing; repeated execution can consume kernel resources without exposing or modifying data.

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

Reference-count leak in the BCM4908 MTD partition parser in Linux allows local users to interrupt service through repeated parser execution. The bcm4908_partitions_fw_offset function acquires the root device-tree node with of_find_node_by_path but omits of_node_put on every return path, retaining a reference each time the parser runs. Reachability requires BCM4908 firmware-partition parsing; repeated execution can consume kernel resources without exposing or modifying data.

The record

CVE
CVE-2022-50155
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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=5.13
  2. Affected versionversion=bb17230c61a6424b622e92006ec52ba23aa5a967 <01bc3840d943cf725dea6ca13e11ffda82bad49a
  3. Affected versionversion=bb17230c61a6424b622e92006ec52ba23aa5a967 <3193c3a3f4fca65cb06d9d48d07fb96bc1f5b2bd
  4. Affected versionversion=bb17230c61a6424b622e92006ec52ba23aa5a967 <762475464982b15014f364ec0cf2a843407f5af1
  5. Affected versionversion=bb17230c61a6424b622e92006ec52ba23aa5a967 <e607879b0da18c451de5e91daf239cc2f2f8ff2d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.13; version=bb17230c61a6424b622e92006ec52ba23aa5a967 <01bc3840d943cf725dea6ca13e11ffda82bad49a; version=bb17230c61a6424b622e92006ec52ba23aa5a967 <3193c3a3f4fca65cb06d9d48d07fb96bc1f5b2bd; version=bb17230c61a6424b622e92006ec52ba23aa5a967 <762475464982b15014f364ec0cf2a843407f5af1; version=bb17230c61a6424b622e92006ec52ba23aa5a967 <e607879b0da18c451de5e91daf239cc2f2f8ff2d

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

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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