CVE-2026-53050 (GCVE-0-2026-53050)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-28 06:38
VLAI
Title
quota: Fix race of dquot_scan_active() with quota deactivation
Summary
In the Linux kernel, the following vulnerability has been resolved: quota: Fix race of dquot_scan_active() with quota deactivation dquot_scan_active() can race with quota deactivation in quota_release_workfn() like: CPU0 (quota_release_workfn) CPU1 (dquot_scan_active) ============================== ============================== spin_lock(&dq_list_lock); list_replace_init( &releasing_dquots, &rls_head); /* dquot X on rls_head, dq_count == 0, DQ_ACTIVE_B still set */ spin_unlock(&dq_list_lock); synchronize_srcu(&dquot_srcu); spin_lock(&dq_list_lock); list_for_each_entry(dquot, &inuse_list, dq_inuse) { /* finds dquot X */ dquot_active(X) -> true atomic_inc(&X->dq_count); } spin_unlock(&dq_list_lock); spin_lock(&dq_list_lock); dquot = list_first_entry(&rls_head); WARN_ON_ONCE(atomic_read(&dquot->dq_count)); The problem is not only a cosmetic one as under memory pressure the caller of dquot_scan_active() can end up working on freed dquot. Fix the problem by making sure the dquot is removed from releasing list when we acquire a reference to it.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 22c06bf1f99ec3ec16b1a81342becba4c59a1f16 , < 2bdc80f4619411e5bd4a3ef23f51e14021ed457c (git)
Affected: 56e96b38d2f7cd95b3c30eb70decac7233915e0a , < f9438cb8c8ec3adc84b2b450a3aab0123d074c3b (git)
Affected: 12a820a9923c11e8e898da9f82c8aded70cdcd16 , < ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a (git)
Affected: 869b6ea1609f655a43251bf41757aa44e5350a8f , < 6678dde265708003c2b42551af4a2e3cb05decd5 (git)
Affected: 869b6ea1609f655a43251bf41757aa44e5350a8f , < 61e25f664dc2a08299e07d84c85776abc2350f75 (git)
Affected: 869b6ea1609f655a43251bf41757aa44e5350a8f , < fdd424d7c35633ac577fd87d1b043d1b8a6cd350 (git)
Affected: 869b6ea1609f655a43251bf41757aa44e5350a8f , < 82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1 (git)
Affected: 869b6ea1609f655a43251bf41757aa44e5350a8f , < e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d (git)
Affected: bb7e3a019b52d829949d02b64ebab37838148fbf (git)
Affected: 061a18239ced5eb086967a2b4451cb1cc5ce0702 (git)
Affected: 2a1ddddba6541143c8f73962f3021f1789114284 (git)
Affected: 5.10.199 , < 5.10.258 (semver)
Affected: 5.15.136 , < 5.15.209 (semver)
Affected: 6.1.59 , < 6.1.175 (semver)
Affected: 4.19.297 , < 4.20 (semver)
Affected: 5.4.259 , < 5.5 (semver)
Affected: 6.5.8 , < 6.6 (semver)
Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nquota: Fix race of dquot_scan_active() with quota deactivation\n\ndquot_scan_active() can race with quota deactivation in\nquota_release_workfn() like:\n\n  CPU0 (quota_release_workfn)         CPU1 (dquot_scan_active)\n  ==============================      ==============================\n  spin_lock(\u0026dq_list_lock);\n  list_replace_init(\n    \u0026releasing_dquots, \u0026rls_head);\n    /* dquot X on rls_head,\n       dq_count == 0,\n       DQ_ACTIVE_B still set */\n  spin_unlock(\u0026dq_list_lock);\n  synchronize_srcu(\u0026dquot_srcu);\n                                      spin_lock(\u0026dq_list_lock);\n                                      list_for_each_entry(dquot,\n                                          \u0026inuse_list, dq_inuse) {\n                                        /* finds dquot X */\n                                        dquot_active(X) -\u003e true\n                                        atomic_inc(\u0026X-\u003edq_count);\n                                      }\n                                      spin_unlock(\u0026dq_list_lock);\n  spin_lock(\u0026dq_list_lock);\n  dquot = list_first_entry(\u0026rls_head);\n  WARN_ON_ONCE(atomic_read(\u0026dquot-\u003edq_count));\n\nThe problem is not only a cosmetic one as under memory pressure the\ncaller of dquot_scan_active() can end up working on freed dquot.\n\nFix the problem by making sure the dquot is removed from releasing list\nwhen we acquire a reference to it."
        }
      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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        "dateUpdated": "2026-06-28T06:38:37.088Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c"
        },
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          "url": "https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b"
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          "url": "https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a"
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          "url": "https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5"
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        {
          "url": "https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d"
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      "title": "quota: Fix race of dquot_scan_active() with quota deactivation",
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    "cveId": "CVE-2026-53050",
    "datePublished": "2026-06-24T16:29:56.043Z",
    "dateReserved": "2026-06-09T07:44:35.381Z",
    "dateUpdated": "2026-06-28T06:38:37.088Z",
    "state": "PUBLISHED"
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    "epss": {
      "cve": "CVE-2026-53050",
      "date": "2026-07-02",
      "epss": "0.00129",
      "percentile": "0.02895"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53050\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:16.887\",\"lastModified\":\"2026-06-28T08:16:31.460\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nquota: Fix race of dquot_scan_active() with quota deactivation\\n\\ndquot_scan_active() can race with quota deactivation in\\nquota_release_workfn() like:\\n\\n  CPU0 (quota_release_workfn)         CPU1 (dquot_scan_active)\\n  ==============================      ==============================\\n  spin_lock(\u0026dq_list_lock);\\n  list_replace_init(\\n    \u0026releasing_dquots, \u0026rls_head);\\n    /* dquot X on rls_head,\\n       dq_count == 0,\\n       DQ_ACTIVE_B still set */\\n  spin_unlock(\u0026dq_list_lock);\\n  synchronize_srcu(\u0026dquot_srcu);\\n                                      spin_lock(\u0026dq_list_lock);\\n                                      list_for_each_entry(dquot,\\n                                          \u0026inuse_list, dq_inuse) {\\n                                        /* finds dquot X */\\n                                        dquot_active(X) -\u003e true\\n                                        atomic_inc(\u0026X-\u003edq_count);\\n                                      }\\n                                      spin_unlock(\u0026dq_list_lock);\\n  spin_lock(\u0026dq_list_lock);\\n  dquot = list_first_entry(\u0026rls_head);\\n  WARN_ON_ONCE(atomic_read(\u0026dquot-\u003edq_count));\\n\\nThe problem is not only a cosmetic one as under memory pressure the\\ncaller of dquot_scan_active() can end up working on freed dquot.\\n\\nFix the problem by making sure the dquot is removed from releasing list\\nwhen we acquire a reference to it.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/quota/dquot.c\",\"include/linux/quotaops.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"22c06bf1f99ec3ec16b1a81342becba4c59a1f16\",\"lessThan\":\"2bdc80f4619411e5bd4a3ef23f51e14021ed457c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"56e96b38d2f7cd95b3c30eb70decac7233915e0a\",\"lessThan\":\"f9438cb8c8ec3adc84b2b450a3aab0123d074c3b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"12a820a9923c11e8e898da9f82c8aded70cdcd16\",\"lessThan\":\"ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"869b6ea1609f655a43251bf41757aa44e5350a8f\",\"lessThan\":\"6678dde265708003c2b42551af4a2e3cb05decd5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"869b6ea1609f655a43251bf41757aa44e5350a8f\",\"lessThan\":\"61e25f664dc2a08299e07d84c85776abc2350f75\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"869b6ea1609f655a43251bf41757aa44e5350a8f\",\"lessThan\":\"fdd424d7c35633ac577fd87d1b043d1b8a6cd350\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"869b6ea1609f655a43251bf41757aa44e5350a8f\",\"lessThan\":\"82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"869b6ea1609f655a43251bf41757aa44e5350a8f\",\"lessThan\":\"e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bb7e3a019b52d829949d02b64ebab37838148fbf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"061a18239ced5eb086967a2b4451cb1cc5ce0702\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a1ddddba6541143c8f73962f3021f1789114284\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.199\",\"lessThan\":\"5.10.258\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.136\",\"lessThan\":\"5.15.209\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.59\",\"lessThan\":\"6.1.175\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.297\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.259\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.5.8\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/quota/dquot.c\",\"include/linux/quotaops.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.