CVE-2023-54168 (GCVE-0-2023-54168)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:08 – Updated: 2026-10-15 21:41
VLAI
Title
RDMA/mlx4: Prevent shift wrapping in set_user_sq_size()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Prevent shift wrapping in set_user_sq_size() The ucmd->log_sq_bb_count variable is controlled by the user so this shift can wrap. Fix it by using check_shl_overflow() in the same way that it was done in commit 515f60004ed9 ("RDMA/hns: Prevent undefined behavior in hns_roce_set_user_sq_size()").
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:38 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < 3d5ae269c4bd392ec1edbfb3bd031b8f42d7feff (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < 8feca625900777e02a449e53fe4121339934c38a (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < 9ad3221c86cc9c6305594b742d4a72dfbd4ea579 (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < 9911be2155720221a4f1f722b22bd0e2388d8bcf (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < 3ce0df3493277b9df275cb8455d9c677ae701230 (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < 196a6df08b08699ace4ce70e1efcdd9081b6565f (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < a183905869e692b6b7805b7472235585eff8e429 (git)
Affected: 839041329fd3410e07d614f81e75bb43367d8f89 , < d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.24
Unaffected: 0 , < 2.6.24 (semver)
Unaffected: 4.19.283 , ≤ 4.19.* (semver)
Unaffected: 5.4.243 , ≤ 5.4.* (semver)
Unaffected: 5.10.180 , ≤ 5.10.* (semver)
Unaffected: 5.15.111 , ≤ 5.15.* (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "value": "AV:L - The attacker-controlled value arrives in the `mlx4_ib_create_qp` udata payload written to `/dev/infiniband/uverbsN`, a local character-device verb call. No remote peer or network packet participates in reaching `set_user_sq_size()`.\nAC:L - Triggering is fully deterministic \u2014 the attacker simply sets `log_sq_bb_count` to 31 (or 63/95/\u2026/255) in the create-QP command; no race, timing window, or memory-layout condition is involved, and the resulting QP context is programmed on every attempt.\nPR:L - No `capable()` or capability gate exists anywhere along `ib_uverbs_open` \u2192 `ib_uverbs_create_qp` \u2192 `create_qp_common`; access is controlled purely by the uverbs device node, which rdma-core\u0027s udev rules ship as mode 0666, so any unprivileged local account (including inside a container, since RDMA devices default to shared net-ns mode) can issue the malformed create-QP.\nUI:N - The whole sequence \u2014 create QP with the wrapped shift, then modify to INIT/RTR/RTS and ring the send doorbell \u2014 is driven entirely by the attacker\u0027s own process. No victim action is needed.\nS:U - The bypassed sanity check, the corrupted `mlx4_ib_qp` state, and the resulting device errors all remain under the host kernel\u0027s security authority; no hypervisor, IOMMU, or sandbox boundary is crossed by the defect itself.\nC:H - The bypass programs the QP context with a 2 MB send queue against an MTT allocation as small as one page, so the adapter translates send-WQE fetches through MTT entries belonging to other RDMA objects \u2014 including other processes\u0027 pinned registrations \u2014 yielding a large, unbounded out-of-bounds read at the DMA layer rather than a few stray bytes.\nI:H - The same out-of-range translation window lets the device act on work-queue entries fetched from memory outside the registered buffer, and `qp-\u003esq.wqe_cnt` becoming `INT_MIN` corrupts the QP context (spuriously setting the `sq_no_prefetch` bit and a maximal `log_sq_size`), giving attacker-induced modification of kernel and device state well beyond the QP\u0027s own resources.\nA:H - This re-exposes exactly the crash that commit 839041329fd3 added the check to prevent (\"arbitrarily large/small values \u2026 can crash the kernel\"); accesses beyond the mapped MTT produce local-access/QP-operation errors and can escalate to a catastrophic adapter error and `mlx4_catas_error()` reset, killing InfiniBand and Ethernet for every user of the ConnectX-3 NIC, and the shift itself panics a `CONFIG_UBSAN_SHIFT` + `panic_on_warn` kernel."
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        "published": "2025-12-30T13:16:04.610",
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            "url": "https://git.kernel.org/stable/c/9ad3221c86cc9c6305594b742d4a72dfbd4ea579"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a183905869e692b6b7805b7472235585eff8e429"
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          {
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            "url": "https://git.kernel.org/stable/c/d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb"
          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:14:44+00:00",
      "cve": "CVE-2023-54168",
      "id": "CVE-2023-54168",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/mlx4: Prevent shift wrapping in set_user_sq_size()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54168.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2023-54168",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-15T21:38:50.339644Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-15T21:38:50.812Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
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            {
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              "product": "Linux",
              "programFiles": [
                "drivers/infiniband/hw/mlx4/qp.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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            },
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              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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                  "version": "2.6.24"
                },
                {
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
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                  "status": "unaffected",
                  "version": "4.19.283",
                  "versionType": "semver"
                },
                {
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                  "status": "unaffected",
                  "version": "5.4.243",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.180",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.111",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.28",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.2.*",
                  "status": "unaffected",
                  "version": "6.2.15",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.3.*",
                  "status": "unaffected",
                  "version": "6.3.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.4",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
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                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.283",
                      "versionStartIncluding": "2.6.24",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.243",
                      "versionStartIncluding": "2.6.24",
                      "vulnerable": true
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                    {
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                    {
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                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.28",
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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.2.15",
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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.3.2",
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                      "vulnerable": true
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                    {
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                    }
                  ],
                  "negate": false,
                  "operator": "OR"
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              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Prevent shift wrapping in set_user_sq_size()\n\nThe ucmd-\u003elog_sq_bb_count variable is controlled by the user so this\nshift can wrap.  Fix it by using check_shl_overflow() in the same way\nthat it was done in commit 515f60004ed9 (\"RDMA/hns: Prevent undefined\nbehavior in hns_roce_set_user_sq_size()\")."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The attacker-controlled value arrives in the `mlx4_ib_create_qp` udata payload written to `/dev/infiniband/uverbsN`, a local character-device verb call. No remote peer or network packet participates in reaching `set_user_sq_size()`.\nAC:L - Triggering is fully deterministic \u2014 the attacker simply sets `log_sq_bb_count` to 31 (or 63/95/\u2026/255) in the create-QP command; no race, timing window, or memory-layout condition is involved, and the resulting QP context is programmed on every attempt.\nPR:L - No `capable()` or capability gate exists anywhere along `ib_uverbs_open` \u2192 `ib_uverbs_create_qp` \u2192 `create_qp_common`; access is controlled purely by the uverbs device node, which rdma-core\u0027s udev rules ship as mode 0666, so any unprivileged local account (including inside a container, since RDMA devices default to shared net-ns mode) can issue the malformed create-QP.\nUI:N - The whole sequence \u2014 create QP with the wrapped shift, then modify to INIT/RTR/RTS and ring the send doorbell \u2014 is driven entirely by the attacker\u0027s own process. No victim action is needed.\nS:U - The bypassed sanity check, the corrupted `mlx4_ib_qp` state, and the resulting device errors all remain under the host kernel\u0027s security authority; no hypervisor, IOMMU, or sandbox boundary is crossed by the defect itself.\nC:H - The bypass programs the QP context with a 2 MB send queue against an MTT allocation as small as one page, so the adapter translates send-WQE fetches through MTT entries belonging to other RDMA objects \u2014 including other processes\u0027 pinned registrations \u2014 yielding a large, unbounded out-of-bounds read at the DMA layer rather than a few stray bytes.\nI:H - The same out-of-range translation window lets the device act on work-queue entries fetched from memory outside the registered buffer, and `qp-\u003esq.wqe_cnt` becoming `INT_MIN` corrupts the QP context (spuriously setting the `sq_no_prefetch` bit and a maximal `log_sq_size`), giving attacker-induced modification of kernel and device state well beyond the QP\u0027s own resources.\nA:H - This re-exposes exactly the crash that commit 839041329fd3 added the check to prevent (\"arbitrarily large/small values \u2026 can crash the kernel\"); accesses beyond the mapped MTT produce local-access/QP-operation errors and can escalate to a catastrophic adapter error and `mlx4_catas_error()` reset, killing InfiniBand and Ethernet for every user of the ConnectX-3 NIC, and the shift itself panics a `CONFIG_UBSAN_SHIFT` + `panic_on_warn` kernel."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:17:49.049Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
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          "references": [
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              "url": "https://git.kernel.org/stable/c/3d5ae269c4bd392ec1edbfb3bd031b8f42d7feff"
            },
            {
              "url": "https://git.kernel.org/stable/c/8feca625900777e02a449e53fe4121339934c38a"
            },
            {
              "url": "https://git.kernel.org/stable/c/9ad3221c86cc9c6305594b742d4a72dfbd4ea579"
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            {
              "url": "https://git.kernel.org/stable/c/9911be2155720221a4f1f722b22bd0e2388d8bcf"
            },
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              "url": "https://git.kernel.org/stable/c/3ce0df3493277b9df275cb8455d9c677ae701230"
            },
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              "url": "https://git.kernel.org/stable/c/196a6df08b08699ace4ce70e1efcdd9081b6565f"
            },
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            },
            {
              "url": "https://git.kernel.org/stable/c/d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb"
            }
          ],
          "title": "RDMA/mlx4: Prevent shift wrapping in set_user_sq_size()",
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          }
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      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-54168",
        "datePublished": "2025-12-30T12:08:43.394Z",
        "dateReserved": "2025-12-30T12:06:44.495Z",
        "dateUpdated": "2026-10-15T21:41:40.726Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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