{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-53151",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-53151"
  ],
  "published": "2024-12-24T11:29:52Z",
  "summary": "svcrdma: Address an integer overflow",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Address an integer overflow\n\nDan Carpenter reports:\n> Commit 78147ca8b4a9 (\"svcrdma: Add a \"parsed chunk list\" data\n> structure\") from Jun 22, 2020 (linux-next), leads to the following\n> Smatch static checker warning:\n>\n>\tnet/sunrpc/xprtrdma/svc_rdma_recvfrom.c:498 xdr_check_write_chunk()\n>\twarn: potential user controlled sizeof overflow 'segcount * 4 * 4'\n>\n> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c\n>     488 static bool xdr_check_write_chunk(struct svc_rdma_recv_ctxt *rctxt)\n>     489 {\n>     490         u32 segcount;\n>     491         __be32 *p;\n>     492\n>     493         if (xdr_stream_decode_u32(&rctxt->rc_stream, &segcount))\n>                                                               ^^^^^^^^\n>\n>     494                 return false;\n>     495\n>     496         /* A bogus segcount causes this buffer overflow check to fail. */\n>     497         p = xdr_inline_decode(&rctxt->rc_stream,\n> --> 498                               segcount * rpcrdma_segment_maxsz * sizeof(*p));\n>\n>\n> segcount is an untrusted u32.  On 32bit systems anything >= SIZE_MAX / 16 will\n> have an integer overflow and some those values will be accepted by\n> xdr_inline_decode().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
    }
  ],
  "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": "6.1.120",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-53151"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/21e1cf688fb0397788c8dd42e1e0b08d58ac5c7b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c1f8195bf68edd2cef0f18a4cead394075a54b5a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/838dd342962cef4c320632a5af48d3c31f2f9877"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4cbc3ba6dc2f746497cade60bcbaa82ae3696689"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e5c440c227ecdc721f2da0dd88b6358afd1031a7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3c63d8946e578663b868cb9912dac616ea68bfd0"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.5,
      "cvss_v3_severity": "High",
      "scenario": "AV:N - The flaw is in nfsd's RPC-over-RDMA server transport header parser, driven entirely by bytes a remote peer places in a Send to the NFS/RDMA listener (port 20049). RoCEv2 and iWARP are IP-routable, and soft-RoCE/soft-iWARP make this reachable over ordinary Ethernet, so this is a remote network attack surface.\nAC:L - The attacker simply encodes segcount=0x40000000 in a Write chunk or Reply chunk; the 32-bit truncation and the xdr_inline_decode(0) short-circuit are deterministic with no race, no memory-layout dependency, and no timing element. Verified the truncation occurs on 64-bit as well as 32-bit hosts.\nPR:N - svc_rdma_xdr_decode_req() runs in svc_rdma_recvfrom() at the transport layer, strictly before svc_process()/svc_authenticate() and before any export or credential check. Any peer able to establish an RDMA-CM connection reaches it with zero credentials.\nUI:N - The malformed transport header is processed automatically by the nfsd receive path as soon as it arrives. No action by any local user or administrator is required.\nS:U - The bad computation and its consequences are confined to the kernel's own memory management within the same security authority. There is no VM, IOMMU, or sandbox boundary crossed.\nC:N - I traced every consumer of the bogus segcount: the only use is pcl_alloc_chunk(), whose oversized kmalloc fails before pcl_alloc_write() can dereference its unchecked raw pointer, so no out-of-bounds data is read. The failed decode returns only a generic RDMA_ERROR reply, disclosing nothing.\nI:N - The bounds-check bypass never reaches the unbounded ch_segments[] write loop in pcl_alloc_write(), because chunk allocation aborts first and the request is rejected with -EINVAL. No kernel memory is modified and no attacker-controlled data is written out of bounds.\nA:H - The bypassed check drives a multi-gigabyte kmalloc whose order exceeds MAX_PAGE_ORDER, tripping WARN_ON_ONCE_GFP() in __alloc_pages() with a stack trace and kernel taint; on the widely deployed panic_on_warn=1 configurations this is an immediate kernel panic triggered by an unauthenticated remote peer."
    }
  }
}