Intel

CVE-2026-23463

Siemens ProductCERT Advisory SSA-019113

mediumEPSS 0.1%

Description

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().

Source: DEBIAN_DSADEBIAN_DSASIEMENS_ADVISORYSIEMENS_ADVISORYUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNBSIBSI_CSAFUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNCVELISTV5NVDEUVDCVEORG

Metrics

Severity
medium
Priority score
217.94
KEV status
—
Exploit maturity
no public PoC known
XIEM Effective CVSS
4.7
Source: nvd-v3
CVSS v3
4.7
CVSS v4
—
EPSS percentile
0.7 %
Low — this CVE sits in the lower 10% of all CVEs scored today.
EPSS score
0.1 %
Low — model estimates < 1% exploitation likelihood.
Published
2021-09-26 00:00 UTC
CWE
—

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Translated2026-07-24 22:10 UTC· nvd@nist.gov
    • Translation: Title: Linux, Description: En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: soc: fsl: qbman: corregir condición de carrera en qman_destroy_fq Cuando QMAN_FQ_FLAG_DYNAMIC_FQID está configurado, existe una condición de carrera entre el estado de fq_table[fq -> idx] y la liberación/asignación del pool, y WARN_ON(fq_table[fq -> idx]) en qman_create_fq() se activa. De hecho, podemos tener: Hilo A Hilo B qman_destroy_fq() qman_create_fq() qman_release_fqid() qman_shutdown_fq() gen_pool_free() -- En este punto, el fqid está disponible de nuevo -- qman_alloc_fqid() -- así, podemos obtener el fqid recién liberado en el hilo B -- fq -> fqid = fqid; fq -> idx = fqid * 2; WARN_ON(fq_table[fq -> idx]); fq_table[fq -> idx] = fq; fq_table[fq -> idx] = NULL; Y añadir algunos registros entre qman_release_fqid() y fq_table[fq -> idx] = NULL hace que el WARN_ON() se active mucho más. Para evitar eso, asegúrese de que fq_table[fq -> idx] se establezca a NULL antes de que se llame a gen_pool_free() usando smp_wmb().

Affected operating systems

  • linux

    amazon / amazon_linux

  • linux

    ubuntu / awsbionic

  • linux

    ubuntu / awsjammy

  • linux

    ubuntu / awsnoble

  • linux

    ubuntu / awsresolute

  • linux

    ubuntu / awsxenial

  • linux

    ubuntu / aws-6.8jammy

  • linux

    ubuntu / aws-hwexenial

  • linux

    ubuntu / azurejammy

  • linux

    ubuntu / azurenoble

  • linux

    ubuntu / azureresolute

  • linux

    ubuntu / azurexenial

  • linux

    ubuntu / azure-4.15bionic

  • linux

    suse / basesystem_module15

  • linux

    debian / debian_linux11.0

  • linux

    debian / debian_linux12.0

  • linux

    debian / debian_linux13.0

  • linux

    suse / development_tools_module15

  • linux

    redhat / enterprise_linux10.0

  • linux

    redhat / enterprise_linux7.0

  • linux

    redhat / enterprise_linux8.0

  • linux

    redhat / enterprise_linux9.0

  • linux

    redhat / enterprise_linux_aus8.4

  • linux

    redhat / enterprise_linux_aus8.6

Affected products

Products and version ranges extracted from the vendor/CERT advisory. A range like „<4.14.6“ implies the update recommendation „upgrade to 4.14.6 or later“.

  • arista

    cloudvision_agni2024.4.0 – 2025.2.2

  • arista

    cloudvision_portal2024.2.0 – 2026.1.0

  • arista

    velocloud_edge4.5.0 – 6.4.1

  • arista

    velocloud_gateway

  • arista

    velocloud_orchestrator

  • canonical

    ubuntu_linux

  • Citrix Systems

    Hypervisor8.2 CU1 LTSR

  • Citrix Systems

    XenServer8.4

  • Dell

    ECS3.8.1.0-3.8.1.7

  • Dell

    NetWorkerVirtual Edition

  • Dell

    NetWorkervProxy 19.13.0.3

  • Dell

    NetWorkervProxy 19.14

  • Dell

    PowerScale OneFS13.2.3

  • Dell

    PowerScale OneFSOneFS

  • Dell

    Secure Connect GatewayAppliance 5.32.00.18

  • gnupg

    libgcrypt1.11.0 – 1.11.3

  • gnupg

    libgcrypt1.12.0 – 1.12.2

  • gnupg

    libgcrypt1.8.8 – 1.10.4

  • Intel

    ProzessorCore Ultra 5

  • Intel

    ProzessorCore Ultra 7

  • Intel

    ProzessorCore Ultra 9

  • julia

    openssh_jll

  • netapp

    active_iq_unified_manager

  • netapp

    clustered_data_ontap

References & sources

Linked CVEs

Show 406 more CVEs
IDCVE-2026-23463
Siemens ProductCERT Advisory SSA-019113 — CVE-2026-23463 | NEOSEC Intel