CVE-2022-48759

Local kernel compromise via rpmsg device teardown race

Published Jun 20, 2024 · Updated Aug 5, 2026

A race condition in Linux kernel rpmsg character-device handling allows local users to trigger a use-after-free during device teardown. rpmsg_ctrldev_release_device frees the enclosing control-device structure while its managed cdev can remain active because cdev release timing is not synchronized. A low-privileged local user must be able to race rpmsg character-device teardown; successful exploitation can compromise kernel confidentiality, integrity, and availability.

CVSS severity7.0
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux kernel rpmsg character-device handling allows local users to trigger a use-after-free during device teardown. rpmsg_ctrldev_release_device frees the enclosing control-device structure while its managed cdev can remain active because cdev release timing is not synchronized. A low-privileged local user must be able to race rpmsg character-device teardown; successful exploitation can compromise kernel confidentiality, integrity, and availability.

The record

CVE
CVE-2022-48759
Published
Jun 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, CWE-362
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.11
  2. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <1dbb206730f3e5ce90014ad569ddf8167ec4124a
  3. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <70cb4295ec806b663665e1d2ed15caab6159880e
  4. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <74d85e9fbc7022a4011102c7474a9c7aeb704a35
  5. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <85aba11a8ea92a8eef2de95ebbe063086fd62d9c
  6. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <b7fb2dad571d1e21173c06cef0bced77b323990a
  7. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <d6cdc6ae542845d4d0ac8b6d99362bde7042a3c7
  8. Affected versionversion=c0cdc19f84a4712cf74888f83af286e3c2e14efd <da27b834c1e0222e149e06caddf7718478086d1b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <1dbb206730f3e5ce90014ad569ddf8167ec4124a; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <70cb4295ec806b663665e1d2ed15caab6159880e; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <74d85e9fbc7022a4011102c7474a9c7aeb704a35; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <85aba11a8ea92a8eef2de95ebbe063086fd62d9c; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <b7fb2dad571d1e21173c06cef0bced77b323990a; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <d6cdc6ae542845d4d0ac8b6d99362bde7042a3c7; version=c0cdc19f84a4712cf74888f83af286e3c2e14efd <da27b834c1e0222e149e06caddf7718478086d1b

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/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

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-416Use After Free
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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