{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-36489",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-36489"
  ],
  "published": "2024-06-21T10:24:08Z",
  "summary": "tls: fix missing memory barrier in tls_init",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: fix missing memory barrier in tls_init\n\nIn tls_init(), a write memory barrier is missing, and store-store\nreordering may cause NULL dereference in tls_{setsockopt,getsockopt}.\n\nCPU0                               CPU1\n-----                              -----\n// In tls_init()\n// In tls_ctx_create()\nctx = kzalloc()\nctx->sk_proto = READ_ONCE(sk->sk_prot) -(1)\n\n// In update_sk_prot()\nWRITE_ONCE(sk->sk_prot, tls_prots)     -(2)\n\n                                   // In sock_common_setsockopt()\n                                   READ_ONCE(sk->sk_prot)->setsockopt()\n\n                                   // In tls_{setsockopt,getsockopt}()\n                                   ctx->sk_proto->setsockopt()    -(3)\n\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\nthe NULL value of ctx->sk_proto, causing NULL dereference.\n\nTo fix it, we rely on rcu_assign_pointer() which implies the release\nbarrier semantic. By moving rcu_assign_pointer() after ctx->sk_proto is\ninitialized, we can ensure that ctx->sk_proto are visible when\nchanging sk->sk_prot.",
  "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": "6.1.93",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-36489"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}