CVE-2023-54209 (GCVE-0-2023-54209)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2026-05-11 19:57
VLAI
Title
block: fix blktrace debugfs entries leakage
Summary
In the Linux kernel, the following vulnerability has been resolved: block: fix blktrace debugfs entries leakage Commit 99d055b4fd4b ("block: remove per-disk debugfs files in blk_unregister_queue") moves blk_trace_shutdown() from blk_release_queue() to blk_unregister_queue(), this is safe if blktrace is created through sysfs, however, there is a regression in corner case. blktrace can still be enabled after del_gendisk() through ioctl if the disk is opened before del_gendisk(), and if blktrace is not shutdown through ioctl before closing the disk, debugfs entries will be leaked. Fix this problem by shutdown blktrace in disk_release(), this is safe because blk_trace_remove() is reentrant.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 99d055b4fd4bbb309c6cdb51a0d420669f777944 , < aa07e56c6a9c7558165690d14eed4fe8babf34fb (git)
Affected: 99d055b4fd4bbb309c6cdb51a0d420669f777944 , < 7149e57cf01184fba175589f8fbe9fbf33be02e1 (git)
Affected: 99d055b4fd4bbb309c6cdb51a0d420669f777944 , < 942e81650b81b4ca62f1d8c61de455c9e7c7e6ca (git)
Affected: 99d055b4fd4bbb309c6cdb51a0d420669f777944 , < dd7de3704af9989b780693d51eaea49a665bd9c2 (git)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.39 , ≤ 6.1.* (semver)
Unaffected: 6.3.13 , ≤ 6.3.* (semver)
Unaffected: 6.4.4 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix blktrace debugfs entries leakage\n\nCommit 99d055b4fd4b (\"block: remove per-disk debugfs files in\nblk_unregister_queue\") moves blk_trace_shutdown() from\nblk_release_queue() to blk_unregister_queue(), this is safe if blktrace\nis created through sysfs, however, there is a regression in corner\ncase.\n\nblktrace can still be enabled after del_gendisk() through ioctl if\nthe disk is opened before del_gendisk(), and if blktrace is not shutdown\nthrough ioctl before closing the disk, debugfs entries will be leaked.\n\nFix this problem by shutdown blktrace in disk_release(), this is safe\nbecause blk_trace_remove() is reentrant."
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        "shortName": "Linux"
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    "datePublished": "2025-12-30T12:11:08.027Z",
    "dateReserved": "2025-12-30T12:06:44.500Z",
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    "state": "PUBLISHED"
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        "descriptions": [
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix blktrace debugfs entries leakage\n\nCommit 99d055b4fd4b (\"block: remove per-disk debugfs files in\nblk_unregister_queue\") moves blk_trace_shutdown() from\nblk_release_queue() to blk_unregister_queue(), this is safe if blktrace\nis created through sysfs, however, there is a regression in corner\ncase.\n\nblktrace can still be enabled after del_gendisk() through ioctl if\nthe disk is opened before del_gendisk(), and if blktrace is not shutdown\nthrough ioctl before closing the disk, debugfs entries will be leaked.\n\nFix this problem by shutdown blktrace in disk_release(), this is safe\nbecause blk_trace_remove() is reentrant."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nblock: soluciona la fuga de entradas debugfs de blktrace\n\nEl commit 99d055b4fd4b (\u2019block: elimina archivos debugfs por disco en blk_unregister_queue\u2019) mueve blk_trace_shutdown() de blk_release_queue() a blk_unregister_queue(), esto es seguro si blktrace se crea a trav\u00e9s de sysfs, sin embargo, hay una regresi\u00f3n en un caso extremo.\n\nblktrace a\u00fan puede habilitarse despu\u00e9s de del_gendisk() a trav\u00e9s de ioctl si el disco se abre antes de del_gendisk(), y si blktrace no se cierra a trav\u00e9s de ioctl antes de cerrar el disco, se producir\u00e1 una fuga de entradas debugfs.\n\nSoluciona este problema cerrando blktrace en disk_release(), esto es seguro porque blk_trace_remove() es reentrante."
          }
        ],
        "id": "CVE-2023-54209",
        "lastModified": "2026-10-28T19:10:00.193",
        "metrics": {},
        "published": "2025-12-30T13:16:09.087",
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      "product_status:known_affected": "108",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: block: fix blktrace debugfs entries leakage",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54209.json",
      "version": "3"
    }
  }
}



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