Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-28 06:38

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

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/2bdc80f4619411e5b…
https://git.kernel.org/stable/c/f9438cb8c8ec3adc8…
https://git.kernel.org/stable/c/ac8a2e0d287ebf35e…
https://git.kernel.org/stable/c/6678dde265708003c…
https://git.kernel.org/stable/c/61e25f664dc2a0829…
https://git.kernel.org/stable/c/fdd424d7c35633ac5…
https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d…
https://git.kernel.org/stable/c/e93ab401da4b2e2c1…

Impacted products

2 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)
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)

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              "status": "unaffected",
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              "status": "unaffected",
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            }
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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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          "url": "https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b"
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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": "2026-07-06",
      "epss": "0.00129",
      "percentile": "0.02899"
    },
    "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\"}]}}"
  }
}

FKIE_CVE-2026-53050

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-28 08:16

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/quota/dquot.c",
            "include/linux/quotaops.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2bdc80f4619411e5bd4a3ef23f51e14021ed457c",
              "status": "affected",
              "version": "22c06bf1f99ec3ec16b1a81342becba4c59a1f16",
              "versionType": "git"
            },
            {
              "lessThan": "f9438cb8c8ec3adc84b2b450a3aab0123d074c3b",
              "status": "affected",
              "version": "56e96b38d2f7cd95b3c30eb70decac7233915e0a",
              "versionType": "git"
            },
            {
              "lessThan": "ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a",
              "status": "affected",
              "version": "12a820a9923c11e8e898da9f82c8aded70cdcd16",
              "versionType": "git"
            },
            {
              "lessThan": "6678dde265708003c2b42551af4a2e3cb05decd5",
              "status": "affected",
              "version": "869b6ea1609f655a43251bf41757aa44e5350a8f",
              "versionType": "git"
            },
            {
              "lessThan": "61e25f664dc2a08299e07d84c85776abc2350f75",
              "status": "affected",
              "version": "869b6ea1609f655a43251bf41757aa44e5350a8f",
              "versionType": "git"
            },
            {
              "lessThan": "fdd424d7c35633ac577fd87d1b043d1b8a6cd350",
              "status": "affected",
              "version": "869b6ea1609f655a43251bf41757aa44e5350a8f",
              "versionType": "git"
            },
            {
              "lessThan": "82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1",
              "status": "affected",
              "version": "869b6ea1609f655a43251bf41757aa44e5350a8f",
              "versionType": "git"
            },
            {
              "lessThan": "e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d",
              "status": "affected",
              "version": "869b6ea1609f655a43251bf41757aa44e5350a8f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bb7e3a019b52d829949d02b64ebab37838148fbf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "061a18239ced5eb086967a2b4451cb1cc5ce0702",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2a1ddddba6541143c8f73962f3021f1789114284",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.258",
              "status": "affected",
              "version": "5.10.199",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.209",
              "status": "affected",
              "version": "5.15.136",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.175",
              "status": "affected",
              "version": "6.1.59",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.297",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.259",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6",
              "status": "affected",
              "version": "6.5.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/quota/dquot.c",
            "include/linux/quotaops.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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."
    }
  ],
  "id": "CVE-2026-53050",
  "lastModified": "2026-06-28T08:16:31.460",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-24T17:17:16.887",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-4MF5-RJC5-62QC

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-28 09:31

Details

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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-53050"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:16Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-4mf5-rjc5-62qc",
  "modified": "2026-06-28T09:31:40Z",
  "published": "2026-06-24T18:32:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53050"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-53050

Vulnerability from csaf_microsoft - Published: 2026-06-02 00:00 - Updated: 2026-06-27 01:16

Summary

quota: Fix race of dquot_scan_active() with quota deactivation

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-53050

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—	None Available

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-53050 quota: Fix race of dquot_scan_active() with quota deactivation - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53050.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "quota: Fix race of dquot_scan_active() with quota deactivation",
    "tracking": {
      "current_release_date": "2026-06-27T01:16:58.000Z",
      "generator": {
        "date": "2026-06-28T07:10:57.321Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-53050",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-27T01:16:58.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 kernel 0:6.6.139.1-1.azl3",
                "product": {
                  "name": "azl3 kernel 0:6.6.139.1-1.azl3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "kernel"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 kernel 0:6.6.139.1-1.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-53050",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-53050 quota: Fix race of dquot_scan_active() with quota deactivation - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53050.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-06-27T01:16:58.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "title": "quota: Fix race of dquot_scan_active() with quota deactivation"
    }
  ]
}

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.

Action not permitted

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

FKIE_CVE-2026-53050

GHSA-4MF5-RJC5-62QC

MSRC_CVE-2026-53050

Tags

Sightings

Nomenclature