{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "cf76c78595ca87548ca5e45c862ac9e0949c4687"
            },
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            },
            {
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            },
            {
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            },
            {
              "fixed": "0e389fc290c350c67591abf4c367119f4689f310"
            },
            {
              "fixed": "9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"
            },
            {
              "fixed": "6371a07148ee979af22a9d6f4c277462953a9a4a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56"
            },
            {
              "last_affected": "65cbd1279f4b999d56a838344a30642db24cd215"
            },
            {
              "last_affected": "97e1db17bc1ef4c2e1789bc9323c7be44fba53f8"
            },
            {
              "last_affected": "6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.4.204"
            },
            {
              "fixed": "4.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
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            },
            {
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            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.14.157"
            },
            {
              "fixed": "4.15"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.19.87"
            },
            {
              "fixed": "4.20"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.20.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80881.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix buffer head management in ocfs2_read_blocks()\n\nIn ocfs2_read_blocks(), caller should't assume that buffer head returned\nby 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops\nb_count from 1 to 0.  If it is not so, buffer head remains on hold and\nlikely to be returned by the next call to 'sb_getblk()' unchanged - that\nis, with BH_Uptodate bit set even if it has failed validation previously,\nthus allowing to insert that buffer head into OCFS2 metadata cache and\nsubmit it to upper layers.  To avoid such a scenario, BH_Uptodate should\nbe cleared immediately after 'validate()' callback has detected some data\ninconsistency.",
  "id": "CVE-2026-80881",
  "modified": "2026-09-06T03:30:47.049562856Z",
  "published": "2026-09-04T16:49:11.758Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80881.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80881"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ocfs2: fix buffer head management in ocfs2_read_blocks()"
}