{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f"
            },
            {
              "fixed": "b88edf12fc3779521ae5f6f1584153b15f7da6df"
            },
            {
              "fixed": "e23bf444512cb85d76012080a76cd1f9e967448e"
            },
            {
              "fixed": "249e905571583a434d4ea8d6f92ccc0eef337115"
            },
            {
              "fixed": "2b001901f689021acd7bf2dceed74a1bdcaaa1f9"
            },
            {
              "fixed": "afdb1533eb9c05432aeb793a7280fa827c502f5c"
            },
            {
              "fixed": "05d345719d85b927cba74afac4d5322de3aa4256"
            },
            {
              "fixed": "fa103fc8f56954a60699a29215cb713448a39e87"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.13.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.20"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23454.json"
  },
  "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-\u003ecaller_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() -\u003e mana_gd_deregister_irq(). Since this runs\nafter kfree(hwc-\u003ecaller_ctx), a concurrent mana_hwc_rx_event_handler()\ncan dereference freed caller_ctx (and rxq-\u003emsg_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-\u003ecaller_ctx. This\nensures all in-flight interrupt handlers complete before the memory they\naccess is freed.",
  "id": "CVE-2026-23454",
  "modified": "2026-07-15T01:49:04.460471497Z",
  "published": "2026-04-03T15:15:36.189Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b88edf12fc3779521ae5f6f1584153b15f7da6df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23454.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23454"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown"
}