FKIE_CVE-2026-80881

Vulnerability from fkie_nvd - Published: 2026-09-04 17:17 - Updated: 2026-09-04 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix buffer head management in ocfs2_read_blocks() In ocfs2_read_blocks(), caller should't assume that buffer head returned by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops b_count from 1 to 0. If it is not so, buffer head remains on hold and likely to be returned by the next call to 'sb_getblk()' unchanged - that is, with BH_Uptodate bit set even if it has failed validation previously, thus allowing to insert that buffer head into OCFS2 metadata cache and submit it to upper layers. To avoid such a scenario, BH_Uptodate should be cleared immediately after 'validate()' callback has detected some data inconsistency.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/buffer_head_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a4eae1499c760949a93459d11390bd1fd823d31d",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "4ab17e328522a4df5fe0f0dcf39098118b1feeaa",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "5927acb3e2c99985a14adecd9d1b67ba191c622d",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "ecb3f9386f4353034caef77239473c627232db17",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "0e389fc290c350c67591abf4c367119f4689f310",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "9e7a057934cdd58e4cc94350bcfe5367bbee0f8e",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "lessThan": "6371a07148ee979af22a9d6f4c277462953a9a4a",
              "status": "affected",
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "65cbd1279f4b999d56a838344a30642db24cd215",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "97e1db17bc1ef4c2e1789bc9323c7be44fba53f8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc",
              "versionType": "git"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.204",
              "versionType": "semver"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.204",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.157",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.87",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/buffer_head_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027t assume that buffer head returned\nby \u0027sb_getblk()\u0027 is exclusively owned and so \u0027put_bh()\u0027 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 \u0027sb_getblk()\u0027 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 \u0027validate()\u0027 callback has detected some data\ninconsistency."
    }
  ],
  "id": "CVE-2026-80881",
  "lastModified": "2026-09-04T17:17:00.390",
  "metrics": {},
  "published": "2026-09-04T17:17:00.390",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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