CVE-2024-49957 (GCVE-0-2024-49957)

Vulnerability from cvelistv5 – Published: 2024-10-21 18:02 – Updated: 2026-05-11 20:42
VLAI
Title
ocfs2: fix null-ptr-deref when journal load failed.
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix null-ptr-deref when journal load failed. During the mounting process, if journal_reset() fails because of too short journal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. Subsequently, ocfs2_journal_shutdown() calls jbd2_journal_flush()->jbd2_cleanup_journal_tail()-> __jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail() ->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer dereference error. To resolve this issue, we should check the JBD2_LOADED flag to ensure the journal was properly loaded. Additionally, use journal instead of osb->journal directly to simplify the code.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:35 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < fd89d92c1140cee8f59de336cb37fa65e359c123 (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < 703b2c7e0798d263154dc8593dc2345f75dc077f (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < bf605ae98dab5c15c5b631d4d7f88898cb41b649 (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < ff55291fb36779819211b596da703389135f5b05 (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < 82dfdd1e31e774578f76ce6dc90c834f96403a0f (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < 86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < f60e94a83db799bde625ac8671a5b4a6354e7120 (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < 387bf565cc03e2e8c720b8b4798efea4aacb6962 (git)
Affected: f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 , < 5784d9fcfd43bd853654bb80c87ef293b9e8e80a (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 4.19.323 , ≤ 4.19.* (semver)
Unaffected: 5.4.285 , ≤ 5.4.* (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.55 , ≤ 6.6.* (semver)
Unaffected: 6.10.14 , ≤ 6.10.* (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix null-ptr-deref when journal load failed.\n\nDuring the mounting process, if journal_reset() fails because of too short\njournal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. \nSubsequently, ocfs2_journal_shutdown() calls\njbd2_journal_flush()-\u003ejbd2_cleanup_journal_tail()-\u003e\n__jbd2_update_log_tail()-\u003ejbd2_journal_update_sb_log_tail()\n-\u003elock_buffer(journal-\u003ej_sb_buffer), resulting in a null-pointer\ndereference error.\n\nTo resolve this issue, we should check the JBD2_LOADED flag to ensure the\njournal was properly loaded.  Additionally, use journal instead of\nosb-\u003ejournal directly to simplify the code."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ocfs2: se corrige el error null-ptr-deref cuando falla la carga del diario. Durante el proceso de montaje, si journal_reset() falla debido a que el diario es demasiado corto, entonces provoca que jbd2_journal_load() falle con j_sb_buffer NULL. Posteriormente, ocfs2_journal_shutdown() llama a jbd2_journal_flush()-\u0026gt;jbd2_cleanup_journal_tail()-\u0026gt; __jbd2_update_log_tail()-\u0026gt;jbd2_journal_update_sb_log_tail() -\u0026gt;lock_buffer(journal-\u0026gt;j_sb_buffer), lo que da como resultado un error de desreferencia de puntero nulo. Para resolver este problema, debemos verificar el indicador JBD2_LOADED para asegurarnos de que el diario se carg\u00f3 correctamente. Adem\u00e1s, use journal en lugar de osb-\u0026gt;journal directamente para simplificar el c\u00f3digo."
          }
        ],
        "id": "CVE-2024-49957",
        "lastModified": "2026-06-17T08:00:49.240",
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                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
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              {
                "lang": "en",
                "value": "CWE-476"
              }
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            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
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    "redhat_vex": {
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      "current_release_date": "2026-10-29T06:44:02+00:00",
      "cve": "CVE-2024-49957",
      "id": "CVE-2024-49957",
      "initial_release_date": "2024-10-21T00:00:00+00:00",
      "product_status:known_not_affected": "197",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ocfs2: fix null-ptr-deref when journal load failed.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-49957.json",
      "version": "3"
    },
    "vulnrichment": {
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              "dateUpdated": "2025-11-03T22:23:36.709Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
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              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
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                  "content": {
                    "id": "CVE-2024-49957",
                    "options": [
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              "shortName": "CISA-ADP"
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              "vendor": "Linux",
              "versions": [
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                  "versionType": "original_commit_for_fix"
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}



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