{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.177-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.95-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.3-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: validate ACL entry sizes in f2fs_acl_from_disk()  f2fs_acl_count() only validates the aggregate ACL xattr length. A malformed ACL can still place ACL_USER or ACL_GROUP in a slot that only contains struct f2fs_acl_entry_short bytes, and f2fs_acl_from_disk() then reads entry-\u003ee_id before verifying that a full entry fits.  Require a short entry before reading e_tag and e_perm, and require a full entry before reading e_id for ACL_USER and ACL_GROUP. Return -EFSCORRUPTED from these new truncated-entry checks, while keeping the pre-existing -EINVAL paths unchanged.  Validation reproduced this kernel report: KASAN slab-out-of-bounds in __f2fs_get_acl+0x6fb/0x7e0 RIP: 0033:0x7f4b835ea7aa The buggy address belongs to the object at ffff888114589960 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of allocated 8-byte region [ffff888114589960, ffff888114589968) Read of size 4 Call trace:   dump_stack_lvl+0x66/0xa0 (?:?)   print_report+0xce/0x630 (?:?)   __f2fs_get_acl+0x6fb/0x7e0 (fs/f2fs/acl.c:169)   srso_alias_return_thunk+0x5/0xfbef5 (?:?)   __virt_addr_valid+0x224/0x430 (?:?)   kasan_report+0xe0/0x110 (?:?)   __f2fs_get_acl+0x5/0x7e0 (fs/f2fs/acl.c:169)   __get_acl+0x281/0x380 (?:?)   vfs_get_acl+0x10b/0x190 (?:?)   do_get_acl+0x2a/0x410 (?:?)   do_get_acl+0x9/0x410 (?:?)   do_getxattr+0xe8/0x260 (?:?)   filename_getxattr+0xd1/0x140 (?:?)   do_getname+0x2d/0x2d0 (?:?)   path_getxattrat+0x16c/0x200 (?:?)   lock_release+0xc8/0x290 (?:?)   cgroup_update_frozen+0x9d/0x320 (?:?)   lockdep_hardirqs_on_prepare+0xea/0x1a0 (?:?)   trace_hardirqs_on+0x1a/0x170 (?:?)   _raw_spin_unlock_irq+0x28/0x50 (?:?)   do_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)   entry_SYSCALL_64_after_hwframe+0x77/0x7f (?:?)",
  "id": "DEBIAN-CVE-2026-63814",
  "modified": "2026-09-14T16:47:29.268896385Z",
  "published": "2026-07-19T12:16:54.390Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-63814"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-63814"
  ]
}