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🛡️ CVE-2022-50423 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()

In the Linux kernel, the following vulnerability has been resolved:

ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()

There is an use-after-free reported by KASAN:

BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82

Read of size 1 at addr ffff888112afc460 by task modprobe/2111

CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),

Call Trace:

<TASK>

kasan_report+0xae/0xe0

acpi_ut_remove_reference+0x3b/0x82

acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5

acpi_ds_store_object_to_local+0x15d/0x3a0

acpi_ex_store+0x78d/0x7fd

acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b

acpi_ps_parse_aml+0x217/0x8d5

...

</TASK>

The root cause of the problem is that the acpi_operand_object

is freed when acpi_ut_walk_package_tree() fails in

acpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in

acpi_ut_copy_iobject_to_iobject(). The problem was introduced

by "8aa5e56eeb61" commit, this commit is to fix memory leak in

acpi_ut_copy_iobject_to_iobject(), repeatedly adding remove

operation, lead to "acpi_operand_object" used after free.

Fix it by removing acpi_ut_remove_reference() in

acpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage()

is called to copy an internal package object into another internal

package object, when it fails, the memory of acpi_operand_object

should be freed by the caller.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2022-50423 is recorded against 2 packages.

  • kernel (from 6.1.0 up to 6.1.2)
  • linux-kernel (from 6.1 up to 6.1.2)

Timeline and source

Published on 1 October 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2022-50423 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-10-01
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.1.0 6.1.2
linux-kernel 6.1 6.1.2

References

Similar Threats

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