CVE-2022-50852

Kernel crash via freed ACPI SAR object

Published Dec 30, 2025 · Updated Dec 30, 2025

Use-after-free in the MT7921 ACPI SAR reader in Linux 6.0 through 6.0.2 allows local users with high privileges to crash the kernel. mt7921_acpi_read() frees sar_root and then reads sar_root->package.count while calculating its return value. Reachability requires local high privileges and a system using the MT7921 driver with applicable ACPI SAR firmware data; the bounded impact is a kernel crash.

CVSS severity4.1
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

Use-after-free in the MT7921 ACPI SAR reader in Linux 6.0 through 6.0.2 allows local users with high privileges to crash the kernel. mt7921_acpi_read() frees sar_root and then reads sar_root->package.count while calculating its return value. Reachability requires local high privileges and a system using the MT7921 driver with applicable ACPI SAR firmware data; the bounded impact is a kernel crash.

The record

CVE
CVE-2022-50852
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=6.0
  2. Affected versionversion=f965333e491e36adb0fa91e389fba8685b704fb6 <3ed0b382cb36f6dac9f93b3a5533cfcd699409a5
  3. Affected versionversion=f965333e491e36adb0fa91e389fba8685b704fb6 <e7de4b4979bd8d313ec837931dde936653ca82ea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=f965333e491e36adb0fa91e389fba8685b704fb6 <3ed0b382cb36f6dac9f93b3a5533cfcd699409a5; version=f965333e491e36adb0fa91e389fba8685b704fb6 <e7de4b4979bd8d313ec837931dde936653ca82ea

Published CVSS scores

4.1SUSECVSS:3.1/AV:L/AC:H/PR:H/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
Privilegesadmin
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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