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NVD / CVE Program· CNA Linux

CVE-2026-23463: soc: fsl: qbman: fix race condition in qman_destroy_fq

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.09% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 014077044e874e270ec480515edbc1cadb976cf2, 265e56714635c5dd1e5964bfd97fa6e73f62cde5, 66442cf9989bd4489fa80d9f37637d58ab016835.

Low priority for now. Upgrade to Linux Linux 014077044e874e270ec480515edbc1cadb976cf2, 265e56714635c5dd1e5964bfd97fa6e73f62cde5, 66442cf9989bd4489fa80d9f37637d58ab016835 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: soc: fsl: qbman: fix race condition in qman_destroy_fq When QMAN_FQ_FLAG_DYNAMIC_FQID is set, there's a race condition between fq_table[fq->idx] state and freeing/allocating from the pool and WARN_ON(fq_table[fq->idx]) in qman_create_fq() gets triggered. Indeed, we can have: Thread A Thread B qman_destroy_fq() qman_create_fq() qman_release_fqid() qman_shutdown_fq() gen_pool_free() -- At this point, the fqid is available again -- qman_alloc_fqid() -- so, we can get the just-freed fqid in thread B -- fq->fqid = fqid; fq->idx = fqid * 2; WARN_ON(fq_table[fq->idx]); fq_table[fq->idx] = fq; fq_table[fq->idx] = NULL; And adding some logs between qman_release_fqid() and fq_table[fq->idx] = NULL makes the WARN_ON() trigger a lot more. To prevent that, ensure that fq_table[fq->idx] is set to NULL before gen_pool_free() is called by using smp_wmb().

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Apr 3, 2026
Updated
Oct 15, 2026
EPSS
0.0% · 0th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.0%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.9 and later · before 5.10.253
  • linux linux kernel5.11 and later · before 5.15.203
  • linux linux kernel5.16 and later · before 6.1.167
  • linux linux kernel6.2 and later · before 6.6.130
  • linux linux kernel6.7 and later · before 6.12.78
  • linux linux kernel6.13 and later · before 6.18.20
  • linux linux kernel6.19 and later · before 6.19.10
  • linux linux kernel7.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.9affected
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before 66442cf9989bd4489fa80d9f37637d58ab016835affected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210affected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before 9e3d47904b8153c8c3ad2f9b66d5008aad677aa8affected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before d21923a8059fa896bfef016f55dd769299335cb4affected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before 751f60bd48edaf03f9d84ab09e5ce6705757d50faffected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before 85dbbf7dc88b0a54f2e334daedf6f3f31fd004faaffected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before 265e56714635c5dd1e5964bfd97fa6e73f62cde5affected · git
    • c535e923bb97a4b361e89a6383693482057f8b0c and later · before 014077044e874e270ec480515edbc1cadb976cf2affected · git
    • before 4.9not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.10-16.19.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-23461Apr 3, 2026 · Bluetooth: L2CAP: Fix use-after-free in l2cap_unregister_user
    35Monitor
  • ← EarlierCVE-2026-23462Apr 3, 2026 · Bluetooth: HIDP: Fix possible UAF
    35Monitor
  • Later →CVE-2026-23466Apr 3, 2026 · drm/xe: Open-code GGTT MMIO access protection
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux014077044e874e270ec480515edbc1cadb976cf2Vendor (CNA)
Linux Linux265e56714635c5dd1e5964bfd97fa6e73f62cde5Vendor (CNA)
Linux Linux66442cf9989bd4489fa80d9f37637d58ab016835Vendor (CNA)
Linux Linux751f60bd48edaf03f9d84ab09e5ce6705757d50fVendor (CNA)
Linux Linux85dbbf7dc88b0a54f2e334daedf6f3f31fd004faVendor (CNA)
Linux Linux9e3d47904b8153c8c3ad2f9b66d5008aad677aa8Vendor (CNA)
Linux Linuxd21923a8059fa896bfef016f55dd769299335cb4Vendor (CNA)
Linux Linuxd288fbe652ef43b7128e4bc0c0c2ef6bd03a2210Vendor (CNA)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records