{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "043546e46dc70c25ff7e2cf6d09cbb0424fc9978"
            },
            {
              "fixed": "add98959b220935b243170214c787bc03044a44d"
            },
            {
              "fixed": "f53b325068bca0b238c3e0d2eb7de9b1f2268cab"
            },
            {
              "fixed": "5959cad3cfa852ec07bbdaf9c17f4838a94a8e6c"
            },
            {
              "fixed": "a13f61ba9b2a7a4ff1f140949ccfad23c5313757"
            },
            {
              "fixed": "ed1cd834da65db127f1c30ff67e78f14825a06c1"
            },
            {
              "fixed": "458776af0061afec1014cb3cd0061e282e482e83"
            },
            {
              "fixed": "3392391b363a63ebb531d45318a729b1c998565b"
            },
            {
              "fixed": "e27bae352158c007143d5bb50f3af33a177c0a37"
            },
            {
              "fixed": "da32af420d6d466e247c43ac0b829edeac7ae0ad"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.8.0"
            },
            {
              "fixed": "5.10.269"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.220"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.187"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.156"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.108"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.47"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80806.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: don't enable DAX on new encrypted files\n\nCurrently, when a new encrypted regular file is created, the call to\next4_set_inode_flags(inode, init=true) in __ext4_new_inode() is made\nbefore EXT4_INODE_ENCRYPT is set.  As a result, it can set S_DAX if the\nfilesystem is mounted with \"-o dax=always\".\n\nEXT4_INODE_ENCRYPT then actually gets set a bit later in\n__ext4_new_inode(), when it calls fscrypt_set_context() which calls\next4_set_context().  ext4_set_context() sets EXT4_INODE_ENCRYPT and\ncalls ext4_set_inode_flags(inode, init=false) to set S_ENCRYPTED too.\n\nThis was intended to clear S_DAX as well.  However, this was broken by\ncommit 043546e46dc7 (\"fs/ext4: Only change S_DAX on inode load\").  This\ncauses data written to the file to bypass encryption, also causing\nxfstests failures such as generic/548 (when \"-o dax=always\" is used).\n\nFix this by simplifying the flow by making __ext4_new_inode() set\nEXT4_INODE_ENCRYPT earlier.  This makes it take effect in\next4_set_inode_flags(inode, init=true), making S_DAX never be set.\n\nSimilarly, make EXT4_STATE_MAY_INLINE_DATA never be set in the first\nplace on new encrypted inodes.  Then it doesn't need to be cleared.\n\nAs a result of these simplifications, ext4_set_context() no longer needs\nto change inode flags or state when 'handle != NULL'.  Remove that too.",
  "id": "CVE-2026-80806",
  "modified": "2026-09-06T03:30:29.732715618Z",
  "published": "2026-09-04T15:13:20.282Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3392391b363a63ebb531d45318a729b1c998565b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/458776af0061afec1014cb3cd0061e282e482e83"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5959cad3cfa852ec07bbdaf9c17f4838a94a8e6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a13f61ba9b2a7a4ff1f140949ccfad23c5313757"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/add98959b220935b243170214c787bc03044a44d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da32af420d6d466e247c43ac0b829edeac7ae0ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e27bae352158c007143d5bb50f3af33a177c0a37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed1cd834da65db127f1c30ff67e78f14825a06c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f53b325068bca0b238c3e0d2eb7de9b1f2268cab"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80806.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80806"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ext4: don't enable DAX on new encrypted files"
}