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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-09-08 08:50
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.
Impacted products
Vendor Product Version CPE status
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)
guessed 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)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
guessed Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website

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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53050\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:16.887\",\"lastModified\":\"2026-09-08T09:18:14.037\",\"vulnStatus\":\"Modified\",\"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\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.297\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"12E3A697-0D43-49C1-A30B-0365A1D27EFF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.259\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"8291EEE5-FECA-46F7-80D3-9C98F05C8995\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.199\",\"versionEndExcluding\":\"5.10.258\",\"matchCriteriaId\":\"C0F45DF0-D7FD-4059-89F5-2D9D6CB1F245\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.136\",\"versionEndExcluding\":\"5.15.209\",\"matchCriteriaId\":\"E79E1FFF-6B98-40D6-BD55-9157D9D56B99\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1.59\",\"versionEndExcluding\":\"6.1.175\",\"matchCriteriaId\":\"AC7D346F-F289-4452-97CF-B5ACD4EEA193\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5.8\",\"versionEndExcluding\":\"6.6\",\"matchCriteriaId\":\"EB6FAAAD-2171-4941-8EE2-DE548E9A1DD9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6.1\",\"versionEndExcluding\":\"6.6.141\",\"matchCriteriaId\":\"0744696C-7355-4177-9EEE-693238BA5C21\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.91\",\"matchCriteriaId\":\"C918746B-DE6F-448F-A93E-A04C5481688D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.33\",\"matchCriteriaId\":\"96D99E49-380D-43AB-BDBA-25C3AD018A9C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.10\",\"matchCriteriaId\":\"A13475D2-59BF-4716-94B5-7C1D239A2CF4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.6:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"E346B162-D566-4E62-ABDE-ECBFB21B8BFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.6:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"E114E9DD-F7E1-40CC-AAD5-F14E586CB2E6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.6:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"DC5BD782-474C-4A68-AED7-6EC818FF89AE\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:35:51+00:00",
      "cve": "CVE-2026-53050",
      "id": "CVE-2026-53050",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "184",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: quota: Fix race of dquot_scan_active() with quota deactivation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53050.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-10T16:59:09Z",
      "cve": "CVE-2026-53050",
      "id": "CVE-2026-53050",
      "initial_release_date": "2026-06-26T02:12:57Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "402",
      "product_status:known_not_affected": "175",
      "product_status:recommended": "442",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53050",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53050.json",
      "version": "23"
    }
  }
}



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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

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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.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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