{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0be8907359df4c62319f5cb2c6981ff0d9ebf35a"
            },
            {
              "fixed": "885aa739a07ab45e90dfa997205acec97979ce4e"
            },
            {
              "fixed": "ced8b48420eddb1251f93c22dc23fa136490b3cd"
            },
            {
              "fixed": "e07237df8538b0ae98dce112e4f6db093d767f80"
            },
            {
              "fixed": "f5f6f06d7e6d262026578b59ba7426eb04acce5d"
            },
            {
              "fixed": "67c3f99bed6f422ba343d2b70a2eeeccdfd91bef"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4.0"
            },
            {
              "fixed": "6.6.134"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.81"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31741.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncounter: rz-mtu3-cnt: prevent counter from being toggled multiple times\n\nRuntime PM counter is incremented / decremented each time the sysfs\nenable file is written to.\n\nIf user writes 0 to the sysfs enable file multiple times, runtime PM\nusage count underflows, generating the following message.\n\nrz-mtu3-counter rz-mtu3-counter.0: Runtime PM usage count underflow!\n\nAt the same time, hardware registers end up being accessed with clocks\noff in rz_mtu3_terminate_counter() to disable an already disabled\nchannel.\n\nIf user writes 1 to the sysfs enable file multiple times, runtime PM\nusage count will be incremented each time, requiring the same number of\n0 writes to get it back to 0.\n\nIf user writes 0 to the sysfs enable file while PWM is in progress, PWM\nis stopped without counter being the owner of the underlying MTU3\nchannel.\n\nCheck against the cached count_is_enabled value and exit if the user\nis trying to set the same enable value.",
  "id": "CVE-2026-31741",
  "modified": "2026-07-08T05:37:57.182199584Z",
  "published": "2026-05-01T14:14:36.845Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67c3f99bed6f422ba343d2b70a2eeeccdfd91bef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/885aa739a07ab45e90dfa997205acec97979ce4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ced8b48420eddb1251f93c22dc23fa136490b3cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e07237df8538b0ae98dce112e4f6db093d767f80"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5f6f06d7e6d262026578b59ba7426eb04acce5d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31741.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31741"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "counter: rz-mtu3-cnt: prevent counter from being toggled multiple times"
}