{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5ef3208e3be50aa08b4e7a2832f34e16d42c08b3"
            },
            {
              "fixed": "3879657c4ffd81b9a42cf575fc6cb60201032587"
            },
            {
              "fixed": "96b2dbbe58a1ea5df8d29c2fe24b5f04715f4443"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80697.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: ensure valid f_path for page cache sharing\n\nPreviously, backing files for page cache sharing were set up with\nf_path left as NULL (only f_inode was valid).  It worked, but a recent\nmincore fix relies on f_path.mnt and crashes (found by \"erofs/028\" on\n7.2-rc4):\n\n BUG: kernel NULL pointer dereference, address: 0000000000000018\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP PTI\n CPU: 3 UID: 0 PID: 675528 Comm: fincore Not tainted 7.2.0-rc4-00002-g[]-dirty #1 PREEMPT(lazy)\n Hardware name: Red Hat KVM, BIOS 1.16.0-4.al8 04/01/2014\n RIP: 0010:__do_sys_mincore+0xc0/0x2c0\n ...\n\nSpecify valid paths using valid disconnected dentries together with\nerofs_ishare_mnt instead of leaving f_path empty, so they are more\nlike real backing files in a pseudo filesystem and standard\nbacking_file_open() can be used directly.",
  "id": "CVE-2026-80697",
  "modified": "2026-08-30T03:30:31.993970312Z",
  "published": "2026-08-28T06:53:02.236Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3879657c4ffd81b9a42cf575fc6cb60201032587"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96b2dbbe58a1ea5df8d29c2fe24b5f04715f4443"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80697.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80697"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "erofs: ensure valid f_path for page cache sharing"
}