CVE-2022-50870 (GCVE-0-2022-50870)
Vulnerability from cvelistv5
Published
2025-12-30 12:15
Modified
2026-01-02 15:05
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: avoid device tree lookups in rtas_os_term() rtas_os_term() is called during panic. Its behavior depends on a couple of conditions in the /rtas node of the device tree, the traversal of which entails locking and local IRQ state changes. If the kernel panics while devtree_lock is held, rtas_os_term() as currently written could hang. Instead of discovering the relevant characteristics at panic time, cache them in file-static variables at boot. Note the lookup for "ibm,extended-os-term" is converted to of_property_read_bool() since it is a boolean property, not an RTAS function token. [mpe: Incorporate suggested change from Nick]
References
Impacted products
Vendor Product Version
Linux Linux Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
Version: 088186ded490ced80758200cf8f906ed741df306
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/kernel/rtas.c"
          ],
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              "version": "6.1.3",
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              "version": "6.2",
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        }
      ],
      "cpeApplicability": [
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: avoid device tree lookups in rtas_os_term()\n\nrtas_os_term() is called during panic. Its behavior depends on a couple\nof conditions in the /rtas node of the device tree, the traversal of\nwhich entails locking and local IRQ state changes. If the kernel panics\nwhile devtree_lock is held, rtas_os_term() as currently written could\nhang.\n\nInstead of discovering the relevant characteristics at panic time,\ncache them in file-static variables at boot. Note the lookup for\n\"ibm,extended-os-term\" is converted to of_property_read_bool() since it\nis a boolean property, not an RTAS function token.\n\n[mpe: Incorporate suggested change from Nick]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-02T15:05:07.299Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e23822c7381c59d9e42e65771b6e17c71ed30ea7"
        },
        {
          "url": "https://git.kernel.org/stable/c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2fa91abf22a705cf02f886cd99cff41f4ceda60"
        },
        {
          "url": "https://git.kernel.org/stable/c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8939315b7342860df143afe0adda6212cdd3193"
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        },
        {
          "url": "https://git.kernel.org/stable/c/464d10e8d797454e16a173ef1292a446b2adf21c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3"
        }
      ],
      "title": "powerpc/rtas: avoid device tree lookups in rtas_os_term()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50870",
    "datePublished": "2025-12-30T12:15:40.718Z",
    "dateReserved": "2025-12-30T12:06:07.136Z",
    "dateUpdated": "2026-01-02T15:05:07.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:01.887\",\"lastModified\":\"2025-12-31T20:43:05.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/rtas: avoid device tree lookups in rtas_os_term()\\n\\nrtas_os_term() is called during panic. Its behavior depends on a couple\\nof conditions in the /rtas node of the device tree, the traversal of\\nwhich entails locking and local IRQ state changes. If the kernel panics\\nwhile devtree_lock is held, rtas_os_term() as currently written could\\nhang.\\n\\nInstead of discovering the relevant characteristics at panic time,\\ncache them in file-static variables at boot. Note the lookup for\\n\\\"ibm,extended-os-term\\\" is converted to of_property_read_bool() since it\\nis a boolean property, not an RTAS function token.\\n\\n[mpe: Incorporate suggested change from Nick]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/464d10e8d797454e16a173ef1292a446b2adf21c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/698e682c849e356fb47a8be47ca8baa817cf31e0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c2fa91abf22a705cf02f886cd99cff41f4ceda60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8939315b7342860df143afe0adda6212cdd3193\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e23822c7381c59d9e42e65771b6e17c71ed30ea7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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