CVE-2026-63822 (GCVE-0-2026-63822)
Vulnerability from cvelistv5
Published
2026-07-19 12:02
Modified
2026-08-17 04:51
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix warning when unbinding If there is an error during some initialization related to firmware, the buffers dp->tx_ring[i].tx_status are released. However this is released again when the device is unbinded (ath11k_pci), and we get: WARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90 Call Trace: free_large_kmalloc ath11k_dp_free ath11k_core_deinit ath11k_pci_remove ... The issue is always reproducible from a VM because the MSI addressing initialization is failing. In order to fix the issue, just set the buffers to NULL after releasing in order to avoid the double free.
References
Impacted products
Vendor Product Version
Linux Linux Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
Version: d5c65159f2895379e11ca13f62feabe93278985d
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath11k/dp.c"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: fix warning when unbinding\n\nIf there is an error during some initialization related to firmware,\nthe buffers dp-\u003etx_ring[i].tx_status are released.\nHowever this is released again when the device is unbinded (ath11k_pci),\nand we get:\nWARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90\nCall Trace:\nfree_large_kmalloc\nath11k_dp_free\nath11k_core_deinit\nath11k_pci_remove\n...\n\nThe issue is always reproducible from a VM because the MSI addressing\ninitialization is failing.\n\nIn order to fix the issue, just set the buffers to NULL after releasing in\norder to avoid the double free."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:51:30.121Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e569a5cb401a267168621aa9a1e7f07fcc9612c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/0aa097a370277deab5337030b9e2d395742f469c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a946abb82f29abe9a15173b707a449cb039b43e"
        },
        {
          "url": "https://git.kernel.org/stable/c/318703b6f71d1a29ee0ac46c32a38f7734d4cfb2"
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          "url": "https://git.kernel.org/stable/c/7b2e62b9080bf4a5f4e70cfe47156df8d93a4f13"
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          "url": "https://git.kernel.org/stable/c/40aa3c2b0cb8e34e0576fc94cc70e4e33db03c0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/051f954b94479d72222c9fbc82a3eef4777bca01"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b7a26b6681922a38cd5a7829ace61f8e54df9b7"
        }
      ],
      "title": "wifi: ath11k: fix warning when unbinding",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63822",
    "datePublished": "2026-07-19T12:02:19.286Z",
    "dateReserved": "2026-07-19T07:54:57.014Z",
    "dateUpdated": "2026-08-17T04:51:30.121Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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