CVE-2022-50423

Freed-memory access via repeated ACPICA reference release

Published Oct 1, 2025 · Updated Oct 1, 2025

Use-after-free in the Linux kernel ACPICA subsystem allows local users to access freed memory during AML package parsing. A package-tree copy failure releases acpi_operand_object, after which acpi_ut_copy_iobject_to_iobject releases the same reference again. Reachability requires local low-privileged execution and the failing copy path; published evidence demonstrates a KASAN-detected invalid read, not a specific privilege gain.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux kernel ACPICA subsystem allows local users to access freed memory during AML package parsing. A package-tree copy failure releases acpi_operand_object, after which acpi_ut_copy_iobject_to_iobject releases the same reference again. Reachability requires local low-privileged execution and the failing copy path; published evidence demonstrates a KASAN-detected invalid read, not a specific privilege gain.

The record

CVE
CVE-2022-50423
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.17
  2. Affected versionversion=7af5504c102a378376101dbd160246b10a814dd0
  3. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <01f2c2052ea50fb9a8ce12e4e83aed0267934ef0
  4. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <02617006b5a46f2ea55ac61f5693c7afd7bf9276
  5. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <02f237423c9c6a18e062de2d474f85d5659e4eb9
  6. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <133462d35dae95edb944af86b986d4c9dec59bd1
  7. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <470188b09e92d83c5a997f25f0e8fb8cd2bc3469
  8. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <6fde666278f91b85d71545a0ebbf41d8d7af8074
  9. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <c9125b643fc51b8e662f2f614096ceb45a0adbc3
  10. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <dfdde4d5138bc023897033a5ac653a84e94805be
  11. Affected versionversion=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6
  12. Affected versionversion=b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8
  13. Affected versionversion=e29a15484d7ea949e49ae7fb7e576a575da824a6
  14. Affected versionversion=e2ab6731a36966d042a2d4dabd980496cd680f75

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.17; version=7af5504c102a378376101dbd160246b10a814dd0; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <01f2c2052ea50fb9a8ce12e4e83aed0267934ef0; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <02617006b5a46f2ea55ac61f5693c7afd7bf9276; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <02f237423c9c6a18e062de2d474f85d5659e4eb9; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <133462d35dae95edb944af86b986d4c9dec59bd1; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <470188b09e92d83c5a997f25f0e8fb8cd2bc3469; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <6fde666278f91b85d71545a0ebbf41d8d7af8074; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <c9125b643fc51b8e662f2f614096ceb45a0adbc3; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <dfdde4d5138bc023897033a5ac653a84e94805be; version=8aa5e56eeb61a099ea6519eb30ee399e1bc043ce <f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6; version=b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8; version=e29a15484d7ea949e49ae7fb7e576a575da824a6; version=e2ab6731a36966d042a2d4dabd980496cd680f75

Published CVSS scores

7.8CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo