quota: Fix race of dquot_scan_active() with quota deactivation
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.
CVE-2026-53050
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53050
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"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"
}
],
"programFiles": [
"fs/quota/dquot.c",
"include/linux/quotaops.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.141",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.91",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/quota/dquot.c",
"include/linux/quotaops.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53050
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #28426 · Revision 1
- Added to Heist Feed
- Publisher date