CVE-2026-53050quota: Fix race of dquot_scan_active() with quota deactivation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 22c06bf1f99ec3ec16b1a81342becba4c59a1f16 builds before 2bdc80f4619411e5bd4a3ef23f51e14021ed457c; from 56e96b38d2f7cd95b3c30eb70decac7233915e0a before f9438cb8c8ec3adc84b2b450a3aab0123d074c3b; from 12a820a9923c11e8e898da9f82c8aded70cdcd16 before ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a; from 869b6ea1609f655a43251bf41757aa44e5350a8f before 6678dde265708003c2b42551af4a2e3cb05decd5; 869b6ea1609f655a43251bf41757aa44e5350a8f builds before 61e25f664dc2a08299e07d84c85776abc2350f75; from 869b6ea1609f655a43251bf41757aa44e5350a8f before fdd424d7c35633ac577fd87d1b043d1b8a6cd350; 869b6ea1609f655a43251bf41757aa44e5350a8f builds before 82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1; from 869b6ea1609f655a43251bf41757aa44e5350a8f before e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d; and 9 more ranges | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.19.297 before 4.20; from 5.4.259 before 5.5; from 5.10.199 before 5.10.258; from 5.15.136 before 5.15.209; from 6.1.59 before 6.1.175; from 6.5.8 before 6.6; from 6.6.1 before 6.6.141; from 6.7 before 6.12.91; and 5 more ranges | NVD |
References
- https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457cpatch
- https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3bpatch
- https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4apatch
- https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5patch
- https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75patch
- https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350patch
- https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1patch
- https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2dpatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.