{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23454",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-23454"
  ],
  "published": "2026-04-03T15:24:34Z",
  "summary": "net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown\n\nA potential race condition exists in mana_hwc_destroy_channel() where\nhwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and\nEvent Queue (EQ) are destroyed. This allows an in-flight CQ interrupt\nhandler to dereference freed memory, leading to a use-after-free or\nNULL pointer dereference in mana_hwc_handle_resp().\n\nmana_smc_teardown_hwc() signals the hardware to stop but does not\nsynchronize against IRQ handlers already executing on other CPUs. The\nIRQ synchronization only happens in mana_hwc_destroy_cq() via\nmana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs\nafter kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler()\ncan dereference freed caller_ctx (and rxq->msg_buf) in\nmana_hwc_handle_resp().\n\nFix this by reordering teardown to reverse-of-creation order: destroy\nthe TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This\nensures all in-flight interrupt handlers complete before the memory they\naccess is freed.",
  "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-2026-23454"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b88edf12fc3779521ae5f6f1584153b15f7da6df"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}