{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a6a6fe27bab48f0d09a64b051e7bde432fcae081"
            },
            {
              "fixed": "35a22117839602bb52283de08894c5a7dde92420"
            },
            {
              "fixed": "5d27d2ffe487df89ce28fda0410eafa05dbe03a0"
            },
            {
              "fixed": "89f6fbe0033c942cb790ffd53ca93a45eeaf1c91"
            },
            {
              "fixed": "dcd90f42a33e4220385f27b515183d0c91b2fc4a"
            },
            {
              "fixed": "94d286fa5eedc550d42bcb9c85416af8f77736ff"
            },
            {
              "fixed": "a3fdd924d88c30b9f488636ce0e4696012cf5511"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.18.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53274.json"
  },
  "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.",
  "id": "CVE-2026-53274",
  "modified": "2026-07-09T03:52:01.108357690Z",
  "published": "2026-06-25T08:39:58.478Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35a22117839602bb52283de08894c5a7dde92420"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d27d2ffe487df89ce28fda0410eafa05dbe03a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89f6fbe0033c942cb790ffd53ca93a45eeaf1c91"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94d286fa5eedc550d42bcb9c85416af8f77736ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3fdd924d88c30b9f488636ce0e4696012cf5511"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcd90f42a33e4220385f27b515183d0c91b2fc4a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53274.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53274"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS"
}