FKIE_CVE-2026-53050
Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-28 08:16
Severity
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"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"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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