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CVE-2022-50433

efi: ssdt: Don't free memory if ACPI table was loaded successfully

High7.8EPSS 0.16%
Published
Updated
Reserved
Assigned by
Linux

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.

Scores

CVSS scores of CVE-2022-50433, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.16% · top 95% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

Affected products

  • Linux · Linux

    • affected 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba – < 11497fd69cd2282538ec6eb4cda1d16fc061233d
    • affected 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba – < 4b017e59f01097f19b938f6dc4dc2c4720701610

  • Linux · Linux

    • affected 6.0
    • unaffected < 6.0
    • unaffected 6.0.4 – ≤ 6.0.*
    • unaffected 6.1 – ≤ *

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .