{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f"
            },
            {
              "fixed": "41897f1bcf4ace5f1f28d0be784b6f4f0e929641"
            },
            {
              "fixed": "9c3469377b1d8caba6bec6ef3c460810bbfb02cc"
            },
            {
              "fixed": "1dd4882dbdc8bfdf2182fa388883c143fac0902a"
            },
            {
              "fixed": "7ba09330d9ea6e996228316719eae812d7e04983"
            },
            {
              "fixed": "c5e6434cc55f30220b228be237bb666351f9f4dd"
            },
            {
              "fixed": "7ace189b9ea79cf78df9c32b940ce12735f9459a"
            },
            {
              "fixed": "2fb8ff81659a57c42bb7b49e8339a2be2a318ef8"
            },
            {
              "fixed": "7461c60b9c6a839b13ad4c3490681a0cf5aa0637"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.7.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "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"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93268.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: skip extra isize expansion during mount to prevent deadlock\n\next4_try_to_expand_extra_isize() is called from __ext4_mark_inode_dirty()\nwhile holding an active jbd2 handle.  During mount (!SB_ACTIVE), the\nexpand path may move xattrs to external blocks and release ea_inodes via\niput().  When !SB_ACTIVE, iput() calls write_inode_now() which acquires\ns_writepages_rwsem, creating a circular lock dependency:\n\n  s_writepages_rwsem --\u003e jbd2_handle --\u003e xattr_sem --\u003e s_writepages_rwsem\n\nThis can be triggered via:\n\n  ext4_process_orphan() -\u003e ext4_truncate() -\u003e ext4_mark_inode_dirty()\n    -\u003e ext4_try_to_expand_extra_isize()\n\nor:\n\n  ext4_evict_inode() -\u003e ext4_mark_inode_dirty()\n    -\u003e ext4_try_to_expand_extra_isize()\n\nSkip expansion when !SB_ACTIVE.  This is a minor loss of functionality\n(extra isize won't grow for these inodes during mount), which e2fsck\ncan resolve later if needed.",
  "id": "CVE-2026-93268",
  "modified": "2026-09-26T03:30:27.322551624Z",
  "published": "2026-09-24T15:52:07.310Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93268.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93268"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ext4: skip extra isize expansion during mount to prevent deadlock"
}