{
  "threat_severity" : "Low",
  "public_date" : "2026-04-03T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: soc: fsl: qbman: fix race condition in qman_destroy_fq",
    "id" : "2454847",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2454847"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "draft"
  },
  "cwe" : "CWE-367",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nsoc: fsl: qbman: fix race condition in qman_destroy_fq\nWhen QMAN_FQ_FLAG_DYNAMIC_FQID is set, there's a race condition between\nfq_table[fq->idx] state and freeing/allocating from the pool and\nWARN_ON(fq_table[fq->idx]) in qman_create_fq() gets triggered.\nIndeed, we can have:\nThread A                             Thread B\nqman_destroy_fq()                    qman_create_fq()\nqman_release_fqid()\nqman_shutdown_fq()\ngen_pool_free()\n-- At this point, the fqid is available again --\nqman_alloc_fqid()\n-- so, we can get the just-freed fqid in thread B --\nfq->fqid = fqid;\nfq->idx = fqid * 2;\nWARN_ON(fq_table[fq->idx]);\nfq_table[fq->idx] = fq;\nfq_table[fq->idx] = NULL;\nAnd adding some logs between qman_release_fqid() and\nfq_table[fq->idx] = NULL makes the WARN_ON() trigger a lot more.\nTo prevent that, ensure that fq_table[fq->idx] is set to NULL before\ngen_pool_free() is called by using smp_wmb().", "A flaw was found in the Linux kernel, specifically within the soc: fsl: qbman component. This vulnerability is caused by a race condition that occurs when managing Frequency Queue Identifiers (FQIDs). If exploited, this race condition can lead to a system crash, resulting in a Denial of Service (DoS) for the affected system." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-23463\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23463\nhttps://lore.kernel.org/linux-cve-announce/2026040320-CVE-2026-23463-e730@gregkh/T" ],
  "name" : "CVE-2026-23463",
  "csaw" : false
}