CVE-2022-50433

HIGH EPSS 4.0%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: efi: ssdt: Don't free memory if ACPI table was loaded successfully Amadeusz reports KASAN use-after-free errors introduced by commit 3881ee0b1edc ("efi: avoid efivars layer when loading SSDTs from variables"). The problem appears to be that the memory that holds the new ACPI table is now freed unconditionally, instead of only when the ACPI core reported a failure to load the table. So let's fix this, by omitting the kfree() on success.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.0  –  <6.0.4
linuxlinux_kernel6.1any

References 2

  • git.kernel.org https://git.kernel.org/stable/c/11497fd69cd2282538ec6eb4cda1d16fc061233d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b017e59f01097f19b938f6dc4dc2c4720701610
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/11497fd69cd2282538ec6eb4cda1d16fc061233d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b017e59f01097f19b938f6dc4dc2c4720701610
    Patch