FKIE_CVE-2025-40193

Vulnerability from fkie_nvd - Published: 2025-11-12 22:15 - Updated: 2026-10-19 21:10
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/xtensa/platforms/iss/simdisk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf",
              "status": "affected",
              "version": "b6c7e873daf765e41233b9752083b66442703b7a",
              "versionType": "git"
            },
            {
              "lessThan": "151bd88859474cdaccc1e4c8b21fbf72dbba2ab4",
              "status": "affected",
              "version": "b6c7e873daf765e41233b9752083b66442703b7a",
              "versionType": "git"
            },
            {
              "lessThan": "d381de7fd4cdc928ede96987dc64b133e6480dd6",
              "status": "affected",
              "version": "b6c7e873daf765e41233b9752083b66442703b7a",
              "versionType": "git"
            },
            {
              "lessThan": "a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a",
              "status": "affected",
              "version": "b6c7e873daf765e41233b9752083b66442703b7a",
              "versionType": "git"
            },
            {
              "lessThan": "5d5f08fd0cd970184376bee07d59f635c8403f63",
              "status": "affected",
              "version": "b6c7e873daf765e41233b9752083b66442703b7a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/xtensa/platforms/iss/simdisk.c"
          ],
          "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"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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()\")"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxtensa: simdisk: a\u00f1adir verificaci\u00f3n del tama\u00f1o de entrada en proc_write_simdisk\n\nUn usuario malicioso podr\u00eda pasar un valor arbitrariamente incorrecto a memdup_user_nul(), causando potencialmente un fallo del kernel.\n\nEsto sigue el mismo patr\u00f3n que el commit ee76746387f6 (\u201cnetdevsim: evitar entrada de usuario incorrecta en nsim_dev_health_break_write()\u201d)"
    }
  ],
  "id": "CVE-2025-40193",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {},
  "published": "2025-11-12T22:15:46.307",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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