CVE-2024-57892 (GCVE-0-2024-57892)

Vulnerability from cvelistv5 – Published: 2025-01-15 13:05 – Updated: 2026-05-11 20:59
VLAI
Title
ocfs2: fix slab-use-after-free due to dangling pointer dqi_priv
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix slab-use-after-free due to dangling pointer dqi_priv When mounting ocfs2 and then remounting it as read-only, a slab-use-after-free occurs after the user uses a syscall to quota_getnextquota. Specifically, sb_dqinfo(sb, type)->dqi_priv is the dangling pointer. During the remounting process, the pointer dqi_priv is freed but is never set as null leaving it to be accessed. Additionally, the read-only option for remounting sets the DQUOT_SUSPENDED flag instead of setting the DQUOT_USAGE_ENABLED flags. Moreover, later in the process of getting the next quota, the function ocfs2_get_next_id is called and only checks the quota usage flags and not the quota suspended flags. To fix this, I set dqi_priv to null when it is freed after remounting with read-only and put a check for DQUOT_SUSPENDED in ocfs2_get_next_id. [akpm@linux-foundation.org: coding-style cleanups]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-13 13:55 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6667 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < 58f9e20e2a7602e1dd649a1ec4790077c251cb6c (git)
Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < 8ff6f635a08c30559ded0c110c7ce03ba7747d11 (git)
Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < f44e6d70c100614c211703f065cad448050e4a0e (git)
Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < 2d431192486367eee03cc28d0b53b97dafcb8e63 (git)
Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < 2e3d203b1adede46bbba049e497765d67865be18 (git)
Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < ba950a02d8d23811aa1120affd3adedcfac6153d (git)
Affected: 8f9e8f5fcc059a3cba87ce837c88316797ef3645 , < 5f3fd772d152229d94602bca243fbb658068a597 (git)
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Linux Linux Affected: 4.6
Unaffected: 0 , < 4.6 (semver)
Unaffected: 5.4.290 , ≤ 5.4.* (semver)
Unaffected: 5.10.234 , ≤ 5.10.* (semver)
Unaffected: 5.15.177 , ≤ 5.15.* (semver)
Unaffected: 6.1.125 , ≤ 6.1.* (semver)
Unaffected: 6.6.70 , ≤ 6.6.* (semver)
Unaffected: 6.12.9 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ocfs2: se corrige slab-use-after-free debido al puntero colgante dqi_priv Al montar ocfs2 y luego volver a montarlo como de solo lectura, se produce un slab-use-after-free despu\u00e9s de que el usuario usa una llamada al sistema a quota_getnextquota. Espec\u00edficamente, sb_dqinfo(sb, type)-\u0026gt;dqi_priv es el puntero colgante. Durante el proceso de remontaje, el puntero dqi_priv se libera pero nunca se establece como nulo, dej\u00e1ndolo para que se pueda acceder a \u00e9l. Adem\u00e1s, la opci\u00f3n de solo lectura para remontaje establece el indicador DQUOT_SUSPENDED en lugar de establecer los indicadores DQUOT_USAGE_ENABLED. Adem\u00e1s, m\u00e1s adelante en el proceso de obtenci\u00f3n de la siguiente cuota, se llama a la funci\u00f3n ocfs2_get_next_id y solo verifica los indicadores de uso de cuota y no los indicadores de cuota suspendida. Para solucionar esto, establezco dqi_priv en nulo cuando se libera despu\u00e9s de volver a montar con solo lectura y pongo una marca de verificaci\u00f3n para DQUOT_SUSPENDED en ocfs2_get_next_id. [akpm@linux-foundation.org: limpiezas de estilo de codificaci\u00f3n]"
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        "id": "CVE-2024-57892",
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    "redhat_vex": {
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      "current_release_date": "2025-11-21T13:55:56+00:00",
      "cve": "CVE-2024-57892",
      "id": "CVE-2024-57892",
      "initial_release_date": "2024-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ocfs2: fix slab-use-after-free due to dangling pointer dqi_priv",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-57892.json",
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix slab-use-after-free due to dangling pointer dqi_priv\n\nWhen mounting ocfs2 and then remounting it as read-only, a\nslab-use-after-free occurs after the user uses a syscall to\nquota_getnextquota.  Specifically, sb_dqinfo(sb, type)-\u003edqi_priv is the\ndangling pointer.\n\nDuring the remounting process, the pointer dqi_priv is freed but is never\nset as null leaving it to be accessed.  Additionally, the read-only option\nfor remounting sets the DQUOT_SUSPENDED flag instead of setting the\nDQUOT_USAGE_ENABLED flags.  Moreover, later in the process of getting the\nnext quota, the function ocfs2_get_next_id is called and only checks the\nquota usage flags and not the quota suspended flags.\n\nTo fix this, I set dqi_priv to null when it is freed after remounting with\nread-only and put a check for DQUOT_SUSPENDED in ocfs2_get_next_id.\n\n[akpm@linux-foundation.org: coding-style cleanups]"
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        "dateReserved": "2025-01-11T14:45:42.028Z",
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  }
}



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