CVE-2023-53848 (GCVE-0-2023-53848)

Vulnerability from cvelistv5 – Published: 2025-12-09 01:30 – Updated: 2025-12-09 01:30
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid5-cache: fix a deadlock in r5l_exit_log() Commit b13015af94cf ("md/raid5-cache: Clear conf->log after finishing work") introduce a new problem: // caller hold reconfig_mutex r5l_exit_log flush_work(&log->disable_writeback_work) r5c_disable_writeback_async wait_event /* * conf->log is not NULL, and mddev_trylock() * will fail, wait_event() can never pass. */ conf->log = NULL Fix this problem by setting 'config->log' to NULL before wake_up() as it used to be, so that wait_event() from r5c_disable_writeback_async() can exist. In the meantime, move forward md_unregister_thread() so that null-ptr-deref this commit fixed can still be fixed.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b13015af94cf405f73ff64ce0797269554020c37 , < ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b (git)
Affected: b13015af94cf405f73ff64ce0797269554020c37 , < 71cf23271f015a57038bdc4669952096f9fe5500 (git)
Affected: b13015af94cf405f73ff64ce0797269554020c37 , < c406984738215dc20ac2dc63e49d70f20797730e (git)
Affected: b13015af94cf405f73ff64ce0797269554020c37 , < a705b11b358dee677aad80630e7608b2d5f56691 (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.53 , ≤ 6.1.* (semver)
Unaffected: 6.4.16 , ≤ 6.4.* (semver)
Unaffected: 6.5.3 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5-cache: fix a deadlock in r5l_exit_log()\n\nCommit b13015af94cf (\"md/raid5-cache: Clear conf-\u003elog after finishing\nwork\") introduce a new problem:\n\n// caller hold reconfig_mutex\nr5l_exit_log\n flush_work(\u0026log-\u003edisable_writeback_work)\n\t\t\tr5c_disable_writeback_async\n\t\t\t wait_event\n\t\t\t  /*\n\t\t\t   * conf-\u003elog is not NULL, and mddev_trylock()\n\t\t\t   * will fail, wait_event() can never pass.\n\t\t\t   */\n conf-\u003elog = NULL\n\nFix this problem by setting \u0027config-\u003elog\u0027 to NULL before wake_up() as it\nused to be, so that wait_event() from r5c_disable_writeback_async() can\nexist. In the meantime, move forward md_unregister_thread() so that\nnull-ptr-deref this commit fixed can still be fixed."
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        "dateUpdated": "2025-12-09T01:30:11.895Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2025-12-09T01:30:11.895Z",
    "dateReserved": "2025-12-09T01:27:17.827Z",
    "dateUpdated": "2025-12-09T01:30:11.895Z",
    "state": "PUBLISHED"
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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