CVE-2022-49391

Local kernel memory corruption via redundant remoteproc free

Published Feb 26, 2025 · Updated May 11, 2026

A double free in the MediaTek SCP remoteproc driver in Linux 5.18 through 5.18.3 allows local users to corrupt kernel memory. The scp_remove() path calls rproc_free() on scp->rproc even though devm_rproc_alloc() already registered that object for managed release. Reaching the fault requires low-privilege local access and a MediaTek SCP device removal event; the resulting double free can crash the kernel or corrupt kernel memory.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A double free in the MediaTek SCP remoteproc driver in Linux 5.18 through 5.18.3 allows local users to corrupt kernel memory. The scp_remove() path calls rproc_free() on scp->rproc even though devm_rproc_alloc() already registered that object for managed release. Reaching the fault requires low-privilege local access and a MediaTek SCP device removal event; the resulting double free can crash the kernel or corrupt kernel memory.

The record

CVE
CVE-2022-49391
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415
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=5.18
  2. Affected versionversion=c1407ac1099ab9726c31d38d806f3150f494c494 <adc02700236613b344a947a897fc2741d52a43b9
  3. Affected versionversion=c1407ac1099ab9726c31d38d806f3150f494c494 <eac3e5b1c12f85732e60f5f8b985444d273866bb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=c1407ac1099ab9726c31d38d806f3150f494c494 <adc02700236613b344a947a897fc2741d52a43b9; version=c1407ac1099ab9726c31d38d806f3150f494c494 <eac3e5b1c12f85732e60f5f8b985444d273866bb

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-415Double Free

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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