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FKIE_CVE-2026-72163

Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-08-17 06:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits [BUG] A direct write over unwritten extents can panic the kernel in ocfs2_assure_trans_credits() when the journal aborts during DIO completion. The crash is a general protection fault from a NULL pointer dereference. [CAUSE] ocfs2_dio_end_io_write() loops over a direct write's unwritten extents, marking each written under a single journal handle. If the journal aborts (for example after an I/O error) while the extent tree is being updated, the handle is left aborted with its transaction pointer cleared. The extent merge treats that failure as not critical and reports success, so the loop keeps using the handle. ocfs2_assure_trans_credits() reads the handle's remaining credits without first checking whether the handle is aborted, and that read dereferences the cleared transaction pointer. [FIX] A journal abort is recorded in the handle itself, so callers are expected to test the handle rather than rely on a returned error. Make ocfs2_assure_trans_credits() do that, as the other ocfs2 journal helpers already do, and return -EROFS when the handle is aborted.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/253ed993e0b36997ec7b04c1ff76103b38241de2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2d80e9c56718435a9c9f5f24dbc954989aead579
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6ad7532a23bc94076efe9f1486dd7f7493c090ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7146d191dae3a8efdb957993fb61a55713186266
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/942b818b396c24c452681803ff291552317d2ef1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f14aaaa130356ee4adb44de947c098637c70df8f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9ab30c96b0f00c20c6dac93681bdae3a033d229
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/journal.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2d80e9c56718435a9c9f5f24dbc954989aead579",
              "status": "affected",
              "version": "a68b896aa56e435506453ec8835bc991ec3ae687",
              "versionType": "git"
            },
            {
              "lessThan": "942b818b396c24c452681803ff291552317d2ef1",
              "status": "affected",
              "version": "320273b5649bbcee87f9e65343077189699d2a7a",
              "versionType": "git"
            },
            {
              "lessThan": "7146d191dae3a8efdb957993fb61a55713186266",
              "status": "affected",
              "version": "9ea2d1c6789722d58ec191f14f9a02518d55b6b4",
              "versionType": "git"
            },
            {
              "lessThan": "f14aaaa130356ee4adb44de947c098637c70df8f",
              "status": "affected",
              "version": "c05ffb693bfb42a48ef3ee88a55b57392984e111",
              "versionType": "git"
            },
            {
              "lessThan": "6ad7532a23bc94076efe9f1486dd7f7493c090ff",
              "status": "affected",
              "version": "be346c1a6eeb49d8fda827d2a9522124c2f72f36",
              "versionType": "git"
            },
            {
              "lessThan": "bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64",
              "status": "affected",
              "version": "be346c1a6eeb49d8fda827d2a9522124c2f72f36",
              "versionType": "git"
            },
            {
              "lessThan": "253ed993e0b36997ec7b04c1ff76103b38241de2",
              "status": "affected",
              "version": "be346c1a6eeb49d8fda827d2a9522124c2f72f36",
              "versionType": "git"
            },
            {
              "lessThan": "f9ab30c96b0f00c20c6dac93681bdae3a033d229",
              "status": "affected",
              "version": "be346c1a6eeb49d8fda827d2a9522124c2f72f36",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "331d1079d58206ff7dc5518185f800b412f89bc6",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.261",
              "status": "affected",
              "version": "5.10.221",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.212",
              "status": "affected",
              "version": "5.15.162",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.178",
              "status": "affected",
              "version": "6.1.97",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.145",
              "status": "affected",
              "version": "6.6.37",
              "versionType": "semver"
            },
            {
              "lessThan": "6.10",
              "status": "affected",
              "version": "6.9.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/journal.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "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 NULL h_transaction deref in ocfs2_assure_trans_credits\n\n[BUG]\nA direct write over unwritten extents can panic the kernel in\nocfs2_assure_trans_credits() when the journal aborts during DIO\ncompletion. The crash is a general protection fault from a NULL pointer\ndereference.\n\n[CAUSE]\nocfs2_dio_end_io_write() loops over a direct write\u0027s unwritten extents,\nmarking each written under a single journal handle. If the journal\naborts (for example after an I/O error) while the extent tree is being\nupdated, the handle is left aborted with its transaction pointer\ncleared. The extent merge treats that failure as not critical and\nreports success, so the loop keeps using the handle.\nocfs2_assure_trans_credits() reads the handle\u0027s remaining credits\nwithout first checking whether the handle is aborted, and that read\ndereferences the cleared transaction pointer.\n\n[FIX]\nA journal abort is recorded in the handle itself, so callers are\nexpected to test the handle rather than rely on a returned error.\nMake ocfs2_assure_trans_credits() do that, as the other ocfs2 journal\nhelpers already do, and return -EROFS when the handle is aborted."
    }
  ],
  "id": "CVE-2026-72163",
  "lastModified": "2026-08-17T06:18:16.597",
  "metrics": {},
  "published": "2026-08-15T06:21:34.217",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/253ed993e0b36997ec7b04c1ff76103b38241de2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2d80e9c56718435a9c9f5f24dbc954989aead579"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6ad7532a23bc94076efe9f1486dd7f7493c090ff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7146d191dae3a8efdb957993fb61a55713186266"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/942b818b396c24c452681803ff291552317d2ef1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f14aaaa130356ee4adb44de947c098637c70df8f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f9ab30c96b0f00c20c6dac93681bdae3a033d229"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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