CVE-2025-21871 (GCVE-0-2025-21871)
Vulnerability from cvelistv5
Published
2025-03-27 13:38
Modified
2025-05-04 07:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix supplicant wait loop OP-TEE supplicant is a user-space daemon and it's possible for it be hung or crashed or killed in the middle of processing an OP-TEE RPC call. It becomes more complicated when there is incorrect shutdown ordering of the supplicant process vs the OP-TEE client application which can eventually lead to system hang-up waiting for the closure of the client application. Allow the client process waiting in kernel for supplicant response to be killed rather than indefinitely waiting in an unkillable state. Also, a normal uninterruptible wait should not have resulted in the hung-task watchdog getting triggered, but the endless loop would. This fixes issues observed during system reboot/shutdown when supplicant got hung for some reason or gets crashed/killed which lead to client getting hung in an unkillable state. It in turn lead to system being in hung up state requiring hard power off/on to recover.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0180cf0373f84fff61b16f8c062553a13dd7cfca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21234efe2a8474a6d2d01ea9573319de7858ce44
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3eb4911364c764572e9db4ab900a57689a54e8ce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70b0d6b0a199c5a3ee6c72f5e61681ed6f759612
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0a9a948159153be145f9471435695373904ee6d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d61cc1a435e6894bfb0dd3370c6f765d2d12825d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ec18520f5edc20a00c34a8c9fdd6507c355e880f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fd9d2d6124c293e40797a080adf8a9c237efd8b8
Impacted products
Vendor Product Version
Linux Linux Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
Version: 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2
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   Linux Linux Version: 4.12
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tee/optee/supp.c"
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          "vendor": "Linux",
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              "version": "6.14",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: optee: Fix supplicant wait loop\n\nOP-TEE supplicant is a user-space daemon and it\u0027s possible for it\nbe hung or crashed or killed in the middle of processing an OP-TEE\nRPC call. It becomes more complicated when there is incorrect shutdown\nordering of the supplicant process vs the OP-TEE client application which\ncan eventually lead to system hang-up waiting for the closure of the\nclient application.\n\nAllow the client process waiting in kernel for supplicant response to\nbe killed rather than indefinitely waiting in an unkillable state. Also,\na normal uninterruptible wait should not have resulted in the hung-task\nwatchdog getting triggered, but the endless loop would.\n\nThis fixes issues observed during system reboot/shutdown when supplicant\ngot hung for some reason or gets crashed/killed which lead to client\ngetting hung in an unkillable state. It in turn lead to system being in\nhung up state requiring hard power off/on to recover."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:22:55.829Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3eb4911364c764572e9db4ab900a57689a54e8ce"
        },
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          "url": "https://git.kernel.org/stable/c/0180cf0373f84fff61b16f8c062553a13dd7cfca"
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          "url": "https://git.kernel.org/stable/c/c0a9a948159153be145f9471435695373904ee6d"
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        {
          "url": "https://git.kernel.org/stable/c/70b0d6b0a199c5a3ee6c72f5e61681ed6f759612"
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      ],
      "title": "tee: optee: Fix supplicant wait loop",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21871",
    "datePublished": "2025-03-27T13:38:23.461Z",
    "dateReserved": "2024-12-29T08:45:45.781Z",
    "dateUpdated": "2025-05-04T07:22:55.829Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
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  }
}


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