Use After Free in Linux
CVE-2022-50433
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.
Vulnerability class: Use-After-Free
EPSS: 0.001 (4.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba, 6.0, 0
- Linux Linux_kernel — versions 6.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2022-50433?
- CVE-2022-50433 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2025-10-01.
- How severe is CVE-2022-50433?
- High severity. CVSS v3 base score is 7.8 out of 10.