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

Vulnerability from cvelistv5 – Published: 2025-12-30 12:08 – Updated: 2026-08-05 09:17
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
Assigner
References
Impacted products
Vendor Product Version
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)
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)
Create a notification for this product.
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{
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          "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": [
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            "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."
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:17:49.049Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/8feca625900777e02a449e53fe4121339934c38a"
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          "url": "https://git.kernel.org/stable/c/d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb"
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      ],
      "title": "RDMA/mlx4: Prevent shift wrapping in set_user_sq_size()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54168",
    "datePublished": "2025-12-30T12:08:43.394Z",
    "dateReserved": "2025-12-30T12:06:44.495Z",
    "dateUpdated": "2026-08-05T09:17:49.049Z",
    "state": "PUBLISHED"
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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()\\\").\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/infiniband/hw/mlx4/qp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"3d5ae269c4bd392ec1edbfb3bd031b8f42d7feff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"8feca625900777e02a449e53fe4121339934c38a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"9ad3221c86cc9c6305594b742d4a72dfbd4ea579\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"9911be2155720221a4f1f722b22bd0e2388d8bcf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"3ce0df3493277b9df275cb8455d9c677ae701230\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"196a6df08b08699ace4ce70e1efcdd9081b6565f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"a183905869e692b6b7805b7472235585eff8e429\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"839041329fd3410e07d614f81e75bb43367d8f89\",\"lessThan\":\"d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/infiniband/hw/mlx4/qp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.24\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.24\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.283\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.243\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.180\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.111\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.28\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.15\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3.2\",\"lessThanOrEqual\":\"6.3.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.4\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/196a6df08b08699ace4ce70e1efcdd9081b6565f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3ce0df3493277b9df275cb8455d9c677ae701230\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3d5ae269c4bd392ec1edbfb3bd031b8f42d7feff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8feca625900777e02a449e53fe4121339934c38a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9911be2155720221a4f1f722b22bd0e2388d8bcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ad3221c86cc9c6305594b742d4a72dfbd4ea579\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a183905869e692b6b7805b7472235585eff8e429\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "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"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-05T01:02:45Z",
      "cve": "CVE-2023-54168",
      "id": "CVE-2023-54168",
      "initial_release_date": "2025-12-31T00:29:24Z",
      "product_status:known_affected": "447",
      "product_status:known_not_affected": "205",
      "product_status:recommended": "252",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54168",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54168.json",
      "version": "26"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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