CVE-2022-50433 (GCVE-0-2022-50433)
Vulnerability from cvelistv5
Published
2025-10-01 11:42
Modified
2025-10-01 11:42
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba
Version: 3881ee0b1edce0ece72d24b7c74f46b73bd6dcba
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/efi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "11497fd69cd2282538ec6eb4cda1d16fc061233d",
              "status": "affected",
              "version": "3881ee0b1edce0ece72d24b7c74f46b73bd6dcba",
              "versionType": "git"
            },
            {
              "lessThan": "4b017e59f01097f19b938f6dc4dc2c4720701610",
              "status": "affected",
              "version": "3881ee0b1edce0ece72d24b7c74f46b73bd6dcba",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/efi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.4",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:42:11.444Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/11497fd69cd2282538ec6eb4cda1d16fc061233d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b017e59f01097f19b938f6dc4dc2c4720701610"
        }
      ],
      "title": "efi: ssdt: Don\u0027t free memory if ACPI table was loaded successfully",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50433",
    "datePublished": "2025-10-01T11:42:11.444Z",
    "dateReserved": "2025-09-17T14:53:07.009Z",
    "dateUpdated": "2025-10-01T11:42:11.444Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50433\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:35.127\",\"lastModified\":\"2025-10-02T19:12:17.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/11497fd69cd2282538ec6eb4cda1d16fc061233d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4b017e59f01097f19b938f6dc4dc2c4720701610\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.