github - ghsa-j393-rh49-r5p6

GHSA-J393-RH49-R5P6

Vulnerability from github – Published: 2025-12-09 18:30 – Updated: 2025-12-09 18:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53848"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-09T16:17:25Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-j393-rh49-r5p6",
  "modified": "2025-12-09T18:30:33Z",
  "published": "2025-12-09T18:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53848"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/71cf23271f015a57038bdc4669952096f9fe5500"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a705b11b358dee677aad80630e7608b2d5f56691"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c406984738215dc20ac2dc63e49d70f20797730e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2025-12-09 01:30 – Updated: 2025-12-09 01:30

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

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/ac9e103f282a7854f…
	https://git.kernel.org/stable/c/71cf23271f015a570…
	https://git.kernel.org/stable/c/c406984738215dc20…
	https://git.kernel.org/stable/c/a705b11b358dee677…

Impacted products

Vendor

Product

Version

Linux

Affected: b13015af94cf405f73ff64ce0797269554020c37 , < ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b (git)
Affected: b13015af94cf405f73ff64ce0797269554020c37 , < 71cf23271f015a57038bdc4669952096f9fe5500 (git)
Affected: b13015af94cf405f73ff64ce0797269554020c37 , < c406984738215dc20ac2dc63e49d70f20797730e (git)
Affected: b13015af94cf405f73ff64ce0797269554020c37 , < a705b11b358dee677aad80630e7608b2d5f56691 (git)

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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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5-cache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b",
              "status": "affected",
              "version": "b13015af94cf405f73ff64ce0797269554020c37",
              "versionType": "git"
            },
            {
              "lessThan": "71cf23271f015a57038bdc4669952096f9fe5500",
              "status": "affected",
              "version": "b13015af94cf405f73ff64ce0797269554020c37",
              "versionType": "git"
            },
            {
              "lessThan": "c406984738215dc20ac2dc63e49d70f20797730e",
              "status": "affected",
              "version": "b13015af94cf405f73ff64ce0797269554020c37",
              "versionType": "git"
            },
            {
              "lessThan": "a705b11b358dee677aad80630e7608b2d5f56691",
              "status": "affected",
              "version": "b13015af94cf405f73ff64ce0797269554020c37",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5-cache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.53",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.16",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.3",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-09T01:30:11.895Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/71cf23271f015a57038bdc4669952096f9fe5500"
        },
        {
          "url": "https://git.kernel.org/stable/c/c406984738215dc20ac2dc63e49d70f20797730e"
        },
        {
          "url": "https://git.kernel.org/stable/c/a705b11b358dee677aad80630e7608b2d5f56691"
        }
      ],
      "title": "md/raid5-cache: fix a deadlock in r5l_exit_log()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53848",
    "datePublished": "2025-12-09T01:30:11.895Z",
    "dateReserved": "2025-12-09T01:27:17.827Z",
    "dateUpdated": "2025-12-09T01:30:11.895Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-J393-RH49-R5P6

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

Tags

Sightings

Nomenclature