High Logic error

CVE-2026-53050 — 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.

Published Jun 24, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.1% (30-day exploitation probability)+0
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.1%

ahead of 1% of scored CVEs · Oct 14, 2026

Affects

Linux

Linux and 1 more

CVSS base

7.8

High · 3 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (logic error), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 12a820a9923c11e8e898da9f82c8aded70cdcd16 and < ac8a2e0d287ebf35e5d7e51e260b4e146648ba4aversion 6.6≥ 6.5.8 and < 6.6≥ 5.4.259 and < 5.5≥ 4.19.297 and < 4.20≥ 6.1.59 and < 6.1.175≥ 5.15.136 and < 5.15.209≥ 5.10.199 and < 5.10.258 and 10 more version 2a1ddddba6541143c8f73962f3021f1789114284version 061a18239ced5eb086967a2b4451cb1cc5ce0702version bb7e3a019b52d829949d02b64ebab37838148fbf≥ 869b6ea1609f655a43251bf41757aa44e5350a8f and < e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d≥ 869b6ea1609f655a43251bf41757aa44e5350a8f and < 82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1≥ 869b6ea1609f655a43251bf41757aa44e5350a8f and < fdd424d7c35633ac577fd87d1b043d1b8a6cd350≥ 869b6ea1609f655a43251bf41757aa44e5350a8f and < 61e25f664dc2a08299e07d84c85776abc2350f75≥ 869b6ea1609f655a43251bf41757aa44e5350a8f and < 6678dde265708003c2b42551af4a2e3cb05decd5≥ 56e96b38d2f7cd95b3c30eb70decac7233915e0a and < f9438cb8c8ec3adc84b2b450a3aab0123d074c3b≥ 22c06bf1f99ec3ec16b1a81342becba4c59a1f16 and < 2bdc80f4619411e5bd4a3ef23f51e14021ed457c	Vulnerable	CVE Program (cve.org) e CISA ADP
Linux	Linux Kernel	≥ 4.19.297 and < 4.20version 6.6-rc7version 6.6-rc6version 6.6≥ 6.19 and < 7.0.10≥ 6.13 and < 6.18.33≥ 6.7 and < 6.12.91≥ 6.6.1 and < 6.6.141 and 5 more ≥ 6.5.8 and < 6.6≥ 6.1.59 and < 6.1.175≥ 5.15.136 and < 5.15.209≥ 5.10.199 and < 5.10.258≥ 5.4.259 and < 5.5	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.8	CVSS 3.1	High	1.8	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.8	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories
7.8	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-362 · Race Condition

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.10%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
Fix documented
Oct 13, 2026 · NIST National Vulnerability Database
CVSS changed · 7.8
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Jun 24, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 15, 2026 – Oct 15, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

12 on the record

git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75
Patch, NIST National Vulnerability Database
github.com/advisories/GHSA-4mf5-rjc5-62qc
GitHub Security Advisories
cert-portal.siemens.com/productcert/html/ssa-457936.html
NIST National Vulnerability Database
cert-portal.siemens.com/productcert/html/ssa-019113.html
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-53050
GitHub Security Advisories

Elsewhere on this site

Linux
every CVE for this vendor

Logic error
same class

CWE-362
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 14h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 14h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CISA SSVC assessment.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-53050 is "quota: Fix race of dquot_scan_active() with quota deactivation", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. EPSS 0.10% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.