{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d25a92ccae6bed02327b63d138e12e7806830f78"
            },
            {
              "fixed": "2f4ece7fed6d915ec64b7735962c0d84d6261032"
            },
            {
              "fixed": "84180988a455fd8e147c6b35c8df65d8b8cc76c2"
            },
            {
              "fixed": "94a913cd521c0f0408820bcdbd80dadf076d97b5"
            },
            {
              "fixed": "cec261b0b4c5c0b044165303198d10ffcdf3414c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90065.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: release the internal TCP sock on IPPROTO_SMC socket creation failure\n\nIPPROTO_SMC sockets create an internal TCP sock (\"clcsock\") from the\nproto-\u003einit hook. When socket creation fails after proto-\u003einit has\nrun - e.g. a cgroup BPF program attached to BPF_CGROUP_INET_SOCK_CREATE\ndenies the socket - sk_common_release() only invokes sk_prot-\u003edestroy\nif it is set, but neither smc_inet_prot nor smc_inet6_prot defines it,\nand smc_destruct() returns early unless sk_state is SMC_CLOSED. As a\nresult, every failing socket(AF_INET, SOCK_STREAM, IPPROTO_SMC) call\nleaks one tcp_sock, so an unprivileged task able to attach a deny-all\nBPF_CGROUP_INET_SOCK_CREATE program to its own cgroup can grow kernel\nmemory unboundedly.\n\nAdd a .destroy hook to both protos that releases the clcsock via\nsmc_clcsock_release(). smc_sk_init() hashes the sock into the smc\nhashinfo before the clcsock is created, and smc_diag dumps walk that\nhash dereferencing smc-\u003eclcsock without taking clcsock_release_lock,\nwhile sk_common_release() calls .destroy before .unhash. Unhash the\nsock before releasing the clcsock, as __smc_release() does, so a\nconcurrent dump cannot observe the release; the second unhash in\nsk_common_release() is a no-op.",
  "id": "CVE-2026-90065",
  "modified": "2026-09-19T03:30:29.432823747Z",
  "published": "2026-09-17T16:05:48.269Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f4ece7fed6d915ec64b7735962c0d84d6261032"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84180988a455fd8e147c6b35c8df65d8b8cc76c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94a913cd521c0f0408820bcdbd80dadf076d97b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cec261b0b4c5c0b044165303198d10ffcdf3414c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90065.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90065"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/smc: release the internal TCP sock on IPPROTO_SMC socket creation failure"
}