# CVE-2022-50433: linux: In the Linux kernel, the following vulnerability has been resolved:  efi: ssdt: Don't free memory if ACPI table was l...

CVE-2022-50433 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50433, released October 1, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-50433
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 1, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.5-1 | [DEBIAN-CVE-2022-50433](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50433.md) | Oct 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.5-1 | [DEBIAN-CVE-2022-50433](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50433.md) | Oct 1, 2025 |
| Linux | linux Debian 14 | 6.0.5-1 | [DEBIAN-CVE-2022-50433](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50433.md) | Oct 1, 2025 |

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