{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53274",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-53274"
  ],
  "published": "2026-06-25T08:41:40Z",
  "summary": "net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS\n\nA logic flaw in __smc_setsockopt() allows a local unprivileged user to\ncause a Denial of Service (DoS) by holding the socket lock indefinitely.\n\nThe function __smc_setsockopt() calls copy_from_sockptr() while holding\nlock_sock(sk). By passing a userfaultfd-monitored memory page (or\nFUSE-backed memory on systems where unprivileged userfaultfd is disabled)\nas the optval, an attacker can halt execution during the copy operation,\nkeeping the lock held.\n\nCombined with asynchronous tear-down operations like shutdown(), this\nexhausts the kernel wq (kworkers) and triggers the hung task watchdog.\n\n[  240.123456] INFO: task kworker/u8:2 blocked for more than 120 seconds.\n[  240.123489] Call Trace:\n[  240.123501]  smc_shutdown+...\n[  240.123512]  lock_sock_nested+...\n\nThis patch moves the user-space copy outside the lock_sock() critical\nsection to prevent the issue.",
  "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": "6.1.176",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53274"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/35a22117839602bb52283de08894c5a7dde92420"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5d27d2ffe487df89ce28fda0410eafa05dbe03a0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89f6fbe0033c942cb790ffd53ca93a45eeaf1c91"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dcd90f42a33e4220385f27b515183d0c91b2fc4a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/94d286fa5eedc550d42bcb9c85416af8f77736ff"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a3fdd924d88c30b9f488636ce0e4696012cf5511"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-25T08:41:40Z"
  }
}