{
  "cveId": "CVE-2026-63816",
  "url": "https://patchblox.com/security/cve/CVE-2026-63816",
  "summary": "CVE-2026-63816 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-63816, released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: atomic: fix UAF issue on f2fs_inode_info.a...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: atomic: fix UAF issue on f2fs_inode_info.atomic_inode  - ioctl(F2FS_IOC_GARBAGE_COLLECT_RANGE)\t\t- shrink  - f2fs_gc   - gc_data_segment    - ra_data_block(cow_inode)     - mapping = F2FS_I(inode)-\u003Eatomic_inode-\u003Ei_mapping     : f2fs_is_cow_file(cow_inode) is true \t\t\t\t\t\t - f2fs_evict_inode(atomic_inode) \t\t\t\t\t\t  - clear_inode_flag(fi-\u003Ecow_inode, FI_COW_FILE) \t\t\t\t\t\t  - F2FS_I(fi-\u003Ecow_inode)-\u003Eatomic_inode = NULL \t\t\t\t\t\t  ... \t\t\t\t\t\t  - truncate_inode_pages_final(atomic_inode)     - f2fs_grab_cache_folio(mapping)     : create folio in atomic_inode-\u003Emapping \t\t\t\t\t\t  - clear_inode(atomic_inode) \t\t\t\t\t\t   - BUG_ON(atomic_inode-\u003Ei_data.nrpages)  We need to add a reference on fi-\u003Eatomic_inode before using its mapping field during garbage collection, otherwise, it will cause UAF issue.",
  "published": "2026-07-19T12:16:54Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00126,
  "epssPercentile": 0.02342,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.96-1",
      "fix": "DEBIAN-CVE-2026-63816",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-63816",
      "released": "2026-07-20T12:58:36Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.3-1",
      "fix": "DEBIAN-CVE-2026-63816",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-63816",
      "released": "2026-07-20T12:58:36Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.100-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-63816",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-63816",
      "released": "2026-07-20T12:58:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}