{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-45891",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-45891"
  ],
  "published": "2026-05-27T12:19:29Z",
  "summary": "net: hns3: fix double free issue for tx spare buffer",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: fix double free issue for tx spare buffer\n\nIn hns3_set_ringparam(), a temporary copy (tmp_rings) of the ring structure\nis created for rollback. However, the tx_spare pointer in the original\nring handle is incorrectly left pointing to the old backup memory.\n\nLater, if memory allocation fails in hns3_init_all_ring() during the setup,\nthe error path attempts to free all newly allocated rings. Since tx_spare\ncontains a stale (non-NULL) pointer from the backup, it is mistaken for\na newly allocated buffer and is erroneously freed, leading to a double-free\nof the backup memory.\n\nThe root cause is that the tx_spare field was not cleared after its value\nwas saved in tmp_rings, leaving a dangling pointer.\n\nFix this by setting tx_spare to NULL in the original ring structure\nwhen the creation of the new `tx_spare` fails. This ensures the\nerror cleanup path only frees genuinely newly allocated buffers.",
  "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": "6.1.165",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45891"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fb6a4c376d454b425555b1b0bda36e99f56ec307"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/43015461662d41dcfb3bb95fadd8a2a42ad8eacf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6dc10494cfe27b6f1e9adb7e293293ae39c50b7c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d2c785733dfb853ea0b53984c75662a1af230a94"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fdbccddb7e7822016601829f95de4008e193f7bc"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c3659273860bed0c8e573b865e3769abc51225a8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6d2f142b1e4b203387a92519d9d2e34752a79dbb"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-27T12:19:29Z"
  }
}