{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23463",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-23463"
  ],
  "published": "2026-04-03T15:24:34Z",
  "summary": "soc: fsl: qbman: fix race condition in qman_destroy_fq",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsoc: fsl: qbman: fix race condition in qman_destroy_fq\n\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.\n\nIndeed, we can have:\n         Thread A                             Thread B\n    qman_destroy_fq()                    qman_create_fq()\n      qman_release_fqid()\n        qman_shutdown_fq()\n        gen_pool_free()\n           -- At this point, the fqid is available again --\n                                           qman_alloc_fqid()\n           -- so, we can get the just-freed fqid in thread B --\n                                           fq->fqid = fqid;\n                                           fq->idx = fqid * 2;\n                                           WARN_ON(fq_table[fq->idx]);\n                                           fq_table[fq->idx] = fq;\n     fq_table[fq->idx] = NULL;\n\nAnd adding some logs between qman_release_fqid() and\nfq_table[fq->idx] = NULL makes the WARN_ON() trigger a lot more.\n\nTo prevent that, ensure that fq_table[fq->idx] is set to NULL before\ngen_pool_free() is called by using smp_wmb().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.167",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23463"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/66442cf9989bd4489fa80d9f37637d58ab016835"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9e3d47904b8153c8c3ad2f9b66d5008aad677aa8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d21923a8059fa896bfef016f55dd769299335cb4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}