CVE-2022-49836

Service interruption via SIOX device-registration memory leak

Published May 1, 2025 · Updated May 11, 2026

Affected Linux kernels allow local users to interrupt service through a memory leak in the SIOX device-registration error path. When device_register() fails, siox_device_add() omits put_device(), leaving the dev_set_name() allocation and device reference unreleased. Exploitation requires local low-privileged access and repeated access to the failing SIOX registration path, with availability as the documented consequence.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Affected Linux kernels allow local users to interrupt service through a memory leak in the SIOX device-registration error path. When device_register() fails, siox_device_add() omits put_device(), leaving the dev_set_name() allocation and device reference unreleased. Exploitation requires local low-privileged access and repeated access to the failing SIOX registration path, with availability as the documented consequence.

The record

CVE
CVE-2022-49836
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=4.16
  2. Affected versionversion=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <0a5da069603ecc3d7aa09167450235462adaa295
  3. Affected versionversion=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <5d03c2911c529ea4d6ebfec53425f1091e8d402b
  4. Affected versionversion=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <6e63153db50059fb78b8a8447b132664887d24e3
  5. Affected versionversion=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <a4b5423f88a17a36550ae8c16c46779b1ee42f4b
  6. Affected versionversion=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <d9c31e728843259209fb530c59995e4fe262699f
  7. Affected versionversion=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <f9fe7ba4ea5b24ffdf8e125f660aca3ba4a147fb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <0a5da069603ecc3d7aa09167450235462adaa295; version=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <5d03c2911c529ea4d6ebfec53425f1091e8d402b; version=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <6e63153db50059fb78b8a8447b132664887d24e3; version=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <a4b5423f88a17a36550ae8c16c46779b1ee42f4b; version=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <d9c31e728843259209fb530c59995e4fe262699f; version=bbecb07fa0af9a41507ce06d4631fdb3b5059417 <f9fe7ba4ea5b24ffdf8e125f660aca3ba4a147fb

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 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

CWE-401Missing Release of Memory after Effective Lifetime

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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