CVE-2025-40193 (GCVE-0-2025-40193)
Vulnerability from cvelistv5
Published
2025-11-12 21:56
Modified
2025-11-12 21:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: xtensa: simdisk: add input size check in proc_write_simdisk A malicious user could pass an arbitrarily bad value to memdup_user_nul(), potentially causing kernel crash. This follows the same pattern as commit ee76746387f6 ("netdevsim: prevent bad user input in nsim_dev_health_break_write()")
References
Impacted products
Vendor Product Version
Linux Linux Version: b6c7e873daf765e41233b9752083b66442703b7a
Version: b6c7e873daf765e41233b9752083b66442703b7a
Version: b6c7e873daf765e41233b9752083b66442703b7a
Version: b6c7e873daf765e41233b9752083b66442703b7a
Version: b6c7e873daf765e41233b9752083b66442703b7a
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/xtensa/platforms/iss/simdisk.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.9"
            },
            {
              "lessThan": "3.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.54",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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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\nxtensa: simdisk: add input size check in proc_write_simdisk\n\nA malicious user could pass an arbitrarily bad value\nto memdup_user_nul(), potentially causing kernel crash.\n\nThis follows the same pattern as commit ee76746387f6\n(\"netdevsim: prevent bad user input in nsim_dev_health_break_write()\")"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-12T21:56:31.751Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf"
        },
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          "url": "https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4"
        },
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63"
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      ],
      "title": "xtensa: simdisk: add input size check in proc_write_simdisk",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40193",
    "datePublished": "2025-11-12T21:56:31.751Z",
    "dateReserved": "2025-04-16T07:20:57.178Z",
    "dateUpdated": "2025-11-12T21:56:31.751Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40193\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-11-12T22:15:46.307\",\"lastModified\":\"2025-11-14T16:42:30.503\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxtensa: simdisk: add input size check in proc_write_simdisk\\n\\nA malicious user could pass an arbitrarily bad value\\nto memdup_user_nul(), potentially causing kernel crash.\\n\\nThis follows the same pattern as commit ee76746387f6\\n(\\\"netdevsim: prevent bad user input in nsim_dev_health_break_write()\\\")\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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