{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1"
            },
            {
              "fixed": "aed24a3c63920539e9de7fbfe7929a2e7c888cd2"
            },
            {
              "fixed": "431c6b872ba7fedcc5a3afb0ec3517db4d95d088"
            },
            {
              "fixed": "54e5a4f7d83db4552d963d0785be32d9df680dcd"
            },
            {
              "fixed": "bab26acebe55e8ad3ab545abda72faa7ca28c477"
            },
            {
              "fixed": "c38b1e19485aaa820e52cfe162525a8af67563da"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.3.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93086.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Avoid IDR updates while cleaning channels\n\nscmi_cleanup_channels() walks the TX/RX channel IDRs with\nidr_for_each() to free transport resources and destroy the dedicated\ntransport devices before calling idr_destroy().\n\nThe destroy callback removed each entry from the same IDR being walked.\nThat is not needed for this cleanup path, and it is unsafe because\nidr_for_each() has not advanced its radix-tree iterator while the\ncallback is running. Removing the current entry from the callback can\ninvalidate the iterator state. The callback also cannot be protected by\nrcu_read_lock(), because scmi_device_destroy() may sleep.\n\nLeave IDR teardown to the following idr_destroy() call and keep the\ncallback limited to device destruction.",
  "id": "CVE-2026-93086",
  "modified": "2026-09-19T03:30:28.223014838Z",
  "published": "2026-09-17T16:11:05.025Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93086.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93086"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "firmware: arm_scmi: Avoid IDR updates while cleaning channels"
}