{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:39:33.276Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/smc/af_smc.c",
            "net/smc/smc_clc.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a36364d8d4fabb105001f992fb8ff2d3546203d6",
              "status": "affected",
              "version": "5c21c4ccafe85906db809de3af391fd434df8a27",
              "versionType": "git"
            },
            {
              "lessThan": "e1cc8be2a785a8f1ce1f597f3e608602c5fccd46",
              "status": "affected",
              "version": "5c21c4ccafe85906db809de3af391fd434df8a27",
              "versionType": "git"
            },
            {
              "lessThan": "935caf324b445fe73d7708fae6f7176fb243f357",
              "status": "affected",
              "version": "5c21c4ccafe85906db809de3af391fd434df8a27",
              "versionType": "git"
            },
            {
              "lessThan": "48d5a8a304a643613dab376a278f29d3e22f7c34",
              "status": "affected",
              "version": "5c21c4ccafe85906db809de3af391fd434df8a27",
              "versionType": "git"
            },
            {
              "lessThan": "9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad",
              "status": "affected",
              "version": "5c21c4ccafe85906db809de3af391fd434df8a27",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/smc/af_smc.c",
            "net/smc/smc_clc.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.176",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.122",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.68",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.7",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: check smcd_v2_ext_offset when receiving proposal msg\n\nWhen receiving proposal msg in server, the field smcd_v2_ext_offset in\nproposal msg is from the remote client and can not be fully trusted.\nOnce the value of smcd_v2_ext_offset exceed the max value, there has\nthe chance to access wrong address, and crash may happen.\n\nThis patch checks the value of smcd_v2_ext_offset before using it."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The malformed CLC Proposal is delivered as ordinary TCP payload to an SMC-enabled listening socket and parsed by `smc_listen_work()`/`smc_clc_wait_msg()`; every field involved (`smcd_v2_ext_offset`, `hdr.length`, `typev1/typev2`, `ism_gid_cnt`) comes straight off the wire. Any host that can route to the listener can trigger it.\nAC:L - A single proposal with a chosen 16-bit `smcd_v2_ext_offset` deterministically moves the pointer up to ~64 KB past the 656-byte buffer, with no race, no timing window, and no state outside the attacker\u0027s control; the attacker can sweep all 65535 offsets across successive connections. The ISM-device precondition is the target\u0027s normal SMC-D configuration, not an attacker-uncontrollable condition.\nPR:N - The CLC handshake runs immediately after the TCP three-way handshake and entirely before any application-level authentication or authorization. An unauthenticated remote attacker only needs to open a TCP connection to the SMC listener.\nUI:N - The proposal is processed automatically by the kernel listen worker as part of the SMC handshake. No action by any local user or administrator is needed.\nS:U - The out-of-bounds access and its consequences are confined to the kernel\u0027s own memory and the SMC subsystem on the target host. No VM, IOMMU, or other security-authority boundary is crossed.\nC:H - The read reaches an attacker-chosen offset up to ~64 KB beyond the slab object \u2014 far from \"strictly bounded to a few bytes\" \u2014 and the OOB bytes are compared against local ISM CHIDs/GIDs and the system EID, giving a remote, repeatable oracle over kernel heap contents at chosen offsets. Groomed heap data reaching `smcd_lgr_match()` can also attach the attacker to another peer\u0027s link group and its shared DMB.\nI:H - The out-of-bounds bytes are stored into `ini-\u003eism_peer_gid[]` and directly drive link-group reuse in `smc_conn_create()` via `smcd_lgr_match()`, so heap-groomable values let an attacker bind their connection into a different peer\u0027s existing SMC-D link group and shared memory buffer, corrupting that peer\u0027s connection state. The wild pointer is also fully attacker-steered across a 64 KB window.\nA:H - The wild dereference occurs in the `smc_hs_wq` worker while holding both `smc_server_lgr_pending` and `smcd_dev_list.mutex`; an unmapped or KASAN-poisoned target oopses the worker with both global mutexes permanently held, hanging all further SMC handshakes and ISM device registration, and panicking the box outright under `panic_on_oops`."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:39:13.246Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a36364d8d4fabb105001f992fb8ff2d3546203d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1cc8be2a785a8f1ce1f597f3e608602c5fccd46"
        },
        {
          "url": "https://git.kernel.org/stable/c/935caf324b445fe73d7708fae6f7176fb243f357"
        },
        {
          "url": "https://git.kernel.org/stable/c/48d5a8a304a643613dab376a278f29d3e22f7c34"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad"
        }
      ],
      "title": "net/smc: check smcd_v2_ext_offset when receiving proposal msg",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47408",
    "datePublished": "2025-01-11T12:35:35.284Z",
    "dateReserved": "2025-01-11T12:34:02.588Z",
    "dateUpdated": "2026-08-05T11:39:13.246Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}