CVE-2022-50411

Local kernel compromise via stale ACPICA walk state

Published Sep 18, 2025 · Updated Sep 18, 2025

Use-after-free in Linux kernel ACPICA allows local users to compromise the kernel by triggering a failed AML control-method call. On the error path, acpi_ds_call_control_method() frees next_walk_state without first removing it from the thread, so acpi_ps_parse_aml() retrieves and reuses the stale walk state. Low-privileged local access is required; successful exploitation can compromise kernel confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability0.16%
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 Linux kernel ACPICA allows local users to compromise the kernel by triggering a failed AML control-method call. On the error path, acpi_ds_call_control_method() frees next_walk_state without first removing it from the thread, so acpi_ps_parse_aml() retrieves and reuses the stale walk state. Low-privileged local access is required; successful exploitation can compromise kernel confidentiality, integrity, and availability.

The record

CVE
CVE-2022-50411
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0462fec709d51762ba486245bc344f44cc6cfa97
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2deb42c4f9776e59bee247c14af9c5e8c05ca9a6
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <38e251d356a01b61a86cb35213cafd7e8fe7090c
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <404ec60438add1afadaffaed34bb5fe4ddcadd40
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5777432ebaaf797e24f059979b42df3139967163
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <799881db3e03b5e98fe6a900d9d7de8c7d61e7ee
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9ef353c92f9d04c88de3af1a46859c1fb76db0f8
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b0b83d3f3ffa96e8395c56b83d6197e184902a34
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f520d181477ec29a496c0b3bbfbdb7e2606c2713

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0462fec709d51762ba486245bc344f44cc6cfa97; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2deb42c4f9776e59bee247c14af9c5e8c05ca9a6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <38e251d356a01b61a86cb35213cafd7e8fe7090c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <404ec60438add1afadaffaed34bb5fe4ddcadd40; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5777432ebaaf797e24f059979b42df3139967163; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <799881db3e03b5e98fe6a900d9d7de8c7d61e7ee; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9ef353c92f9d04c88de3af1a46859c1fb76db0f8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b0b83d3f3ffa96e8395c56b83d6197e184902a34; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f520d181477ec29a496c0b3bbfbdb7e2606c2713

Published CVSS scores

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

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
T1068Exploitation for Privilege Escalation

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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