{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "893dea9ccd08dab924839354aba21d4ed7a9abc0"
            },
            {
              "fixed": "3d64dcc0799c2d6921ba027716b7be721eb19fa8"
            },
            {
              "fixed": "d1ad8fe7f72d73e1617bac79f2ec7a3bedf47e2a"
            },
            {
              "fixed": "8f098037139b294050053123ab2bc0f819d08932"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.18.17"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23346.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: io: Extract user memory type in ioremap_prot()\n\nThe only caller of ioremap_prot() outside of the generic ioremap()\nimplementation is generic_access_phys(), which passes a 'pgprot_t' value\ndetermined from the user mapping of the target 'pfn' being accessed by\nthe kernel. On arm64, the 'pgprot_t' contains all of the non-address\nbits from the pte, including the permission controls, and so we end up\nreturning a new user mapping from ioremap_prot() which faults when\naccessed from the kernel on systems with PAN:\n\n  | Unable to handle kernel read from unreadable memory at virtual address ffff80008ea89000\n  | ...\n  | Call trace:\n  |   __memcpy_fromio+0x80/0xf8\n  |   generic_access_phys+0x20c/0x2b8\n  |   __access_remote_vm+0x46c/0x5b8\n  |   access_remote_vm+0x18/0x30\n  |   environ_read+0x238/0x3e8\n  |   vfs_read+0xe4/0x2b0\n  |   ksys_read+0xcc/0x178\n  |   __arm64_sys_read+0x4c/0x68\n\nExtract only the memory type from the user 'pgprot_t' in ioremap_prot()\nand assert that we're being passed a user mapping, to protect us against\nany changes in future that may require additional handling. To avoid\nfalsely flagging users of ioremap(), provide our own ioremap() macro\nwhich simply wraps __ioremap_prot().",
  "id": "CVE-2026-23346",
  "modified": "2026-04-01T23:08:31.990129305Z",
  "published": "2026-03-25T10:27:33.133Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d64dcc0799c2d6921ba027716b7be721eb19fa8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f098037139b294050053123ab2bc0f819d08932"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1ad8fe7f72d73e1617bac79f2ec7a3bedf47e2a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23346.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23346"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "arm64: io: Extract user memory type in ioremap_prot()"
}