{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "333feb7ba84f69f9b423422417aaac54fd9e7c84"
            },
            {
              "fixed": "b27e68ad818a4ca2cef8f35f97e75d756714c818"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "000a9a72efa4a9df289bab9c9e8ba1639c72e0d6"
            },
            {
              "fixed": "28a924c7e67e6d71abeb04860b61166fecb027fc"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b"
            },
            {
              "fixed": "d585ed08308909c7e6fefb4e8a258aeb29b19ff9"
            },
            {
              "fixed": "077df8464cf24f8ffc82fb6efec2ae600686e699"
            },
            {
              "fixed": "aab1880058ac767d3ea9388a9a7221c776c22c44"
            },
            {
              "fixed": "c8a109c9e23a2c7fd548473dde728b2cb8188146"
            },
            {
              "fixed": "c22f91d82cb9a29d22bdffdce6c803467984ad0c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.121"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.40"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89779.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate ef-\u003esize covers the record's name and value\n\nWhen an EA record has a non-zero ef-\u003esize, ntfs_read_ea() only checks\nthat the record fits in the remaining buffer (ea_size \u003e bytes), not that\nef-\u003esize is large enough to hold the record's own name_len + 1 + elength.\n\nA crafted image can pass validation with, e.g., ef-\u003esize = 24 but\nelength = 0xffff. ntfs_get_ea() then trusts elength and copies it out of\nthe undersized record, reading past the kmalloc(info-\u003esize) allocation\nand leaking heap memory to userspace via getxattr():\n\n BUG: KASAN: slab-out-of-bounds in ntfs_get_ea (fs/ntfs3/xattr.c:302)\n Read of size 65535 at addr ffff888100794550 by task exploit\n  __asan_memcpy (mm/kasan/shadow.c:105)\n  ntfs_get_ea (fs/ntfs3/xattr.c:302)\n  ntfs_getxattr (fs/ntfs3/xattr.c:848)\n  __vfs_getxattr (fs/xattr.c:441)\n  vfs_getxattr (fs/xattr.c:474)\n  do_getxattr (fs/xattr.c:800)\n  path_getxattrat (fs/xattr.c:868)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n\n The buggy address is located 80 bytes inside of\n  allocated 84-byte region in cache kmalloc-96\n\nCompute the size the record needs and require ef-\u003esize to cover it.",
  "id": "CVE-2026-89779",
  "modified": "2026-09-17T03:30:44.033562273Z",
  "published": "2026-09-16T08:48:19.083Z",
  "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/077df8464cf24f8ffc82fb6efec2ae600686e699"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28a924c7e67e6d71abeb04860b61166fecb027fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aab1880058ac767d3ea9388a9a7221c776c22c44"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b27e68ad818a4ca2cef8f35f97e75d756714c818"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c22f91d82cb9a29d22bdffdce6c803467984ad0c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8a109c9e23a2c7fd548473dde728b2cb8188146"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d585ed08308909c7e6fefb4e8a258aeb29b19ff9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89779.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89779"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fs/ntfs3: validate ef-\u003esize covers the record's name and value"
}