CVE-2022-50433 (GCVE-0-2022-50433)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2025-10-01 11:42
VLAI?
Title
efi: ssdt: Don't free memory if ACPI table was loaded successfully
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba , < 11497fd69cd2282538ec6eb4cda1d16fc061233d (git)
Affected: 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba , < 4b017e59f01097f19b938f6dc4dc2c4720701610 (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.0.4 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: ssdt: Don\u0027t free memory if ACPI table was loaded successfully\n\nAmadeusz reports KASAN use-after-free errors introduced by commit\n3881ee0b1edc (\"efi: avoid efivars layer when loading SSDTs from\nvariables\"). The problem appears to be that the memory that holds the\nnew ACPI table is now freed unconditionally, instead of only when the\nACPI core reported a failure to load the table.\n\nSo let\u0027s fix this, by omitting the kfree() on success."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:42:11.444Z",
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    "datePublished": "2025-10-01T11:42:11.444Z",
    "dateReserved": "2025-09-17T14:53:07.009Z",
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    "state": "PUBLISHED"
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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