{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  cifs: call pagecache_isize_extended() in cifs_setsize() when extending  cifs_setsize() calls truncate_pagecache() but skips pagecache_isize_extended() on extension.  truncate_setsize() shows the correct pattern:    i_size_write(inode, newsize);   if (newsize \u003e oldsize)       pagecache_isize_extended(inode, oldsize, newsize);   truncate_pagecache(inode, newsize);  pagecache_isize_extended() zeroes the tail of the page straddling old EOF.  Without it, dirty bytes in that region can be written back to the server, exposing stale data in the newly extended range.",
  "id": "DEBIAN-CVE-2026-89642",
  "modified": "2026-09-14T08:47:40.020975611Z",
  "published": "2026-09-11T20:19:49.980Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89642"
    }
  ],
  "upstream": [
    "CVE-2026-89642"
  ]
}