CVE-2026-72494 (GCVE-0-2026-72494)
Vulnerability from cvelistv5
Published
2026-08-15 05:57
Modified
2026-08-17 05:44
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Replace waitqueue and flag with completion The driver previously used a waitqueue along with an explicit request_done flag, but without proper barriers around request_done. An earlier patch by Gui-Dong Han <hanguidong02@gmail.com> attempted to fix this by adding the missing memory barriers. Rather than adding the barriers, this patch replaces the waitqueue+flag with a completion, which is designed for this exact purpose.
References
Impacted products
Vendor Product Version
Linux Linux Version: 44d9e52977a1b90b0db1c7f8b197c218e9226520
Version: 44d9e52977a1b90b0db1c7f8b197c218e9226520
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/irdma/hw.c",
            "drivers/infiniband/hw/irdma/main.h",
            "drivers/infiniband/hw/irdma/utils.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bde37aed0724c0139dea177f3aae8d989b6babb1",
              "status": "affected",
              "version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
              "versionType": "git"
            },
            {
              "lessThan": "d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd",
              "status": "affected",
              "version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/irdma/hw.c",
            "drivers/infiniband/hw/irdma/main.h",
            "drivers/infiniband/hw/irdma/utils.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Replace waitqueue and flag with completion\n\nThe driver previously used a waitqueue along with an explicit\nrequest_done flag, but without proper barriers around request_done.\n\nAn earlier patch by Gui-Dong Han \u003changuidong02@gmail.com\u003e attempted\nto fix this by adding the missing memory barriers. Rather than\nadding the barriers, this patch replaces the waitqueue+flag with\na completion, which is designed for this exact purpose."
        }
      ],
      "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 - Intel irdma CQP completion/wait synchronization is exercised from remote iWARP/RoCE connection management (SYN/listener/IEQ/AEQ) and deferred-completion events, not only local ibverbs; network peers drive the completion side of the race on internet-facing RDMA/NFS/SMB-Direct servers.\nAC:L - Attacker controls both sides by flooding concurrent connections/CQP ops remotely or via concurrent RDMA verbs locally; missing release/acquire ordering on request_done vs compl_info is triggerable at high operation rates without luck-dependent layout.\nPR:N - Remote CM and packet-processing paths issue/wait on CQP before MPA/application auth; local exploitation needs only standard unprivileged /dev/infiniband/uverbs* access (0666 under typical rdma-core udev rules), not init-namespace capabilities.\nUI:N - Exploitation needs only attacker-driven network or verbs traffic against an already-bound RDMA device/listener; no additional victim user action at attack time beyond normal server role.\nS:U - Impact stays within kernel/driver security domain (CQP request objects, NIC PF reset); no VM escape or cross-authority boundary.\nC:H - Without proper barriers the waiter can observe request_done before compl_info stores, return success with stale op_ret_val/error, and recycle the cqp_request while hardware still references scratch \u2192 UAF/read primitives.\nI:H - Premature recycle/double-put of dynamic cqp_requests enables attacker-influenced heap reuse; stale callbacks on reused objects and invalid kfree paths provide kernel write/control-flow corruption primitives.\nA:H - Lost request_done causes CQP timeout \u2192 ice_rdma_request_reset PF reset; wrong completion state can leave mod_qp_waitq in uninterruptible wait; UAF/panic paths cause kernel crash/hang."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:44:55.551Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bde37aed0724c0139dea177f3aae8d989b6babb1"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd"
        }
      ],
      "title": "RDMA/irdma: Replace waitqueue and flag with completion",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72494",
    "datePublished": "2026-08-15T05:57:28.280Z",
    "dateReserved": "2026-08-09T03:40:39.937Z",
    "dateUpdated": "2026-08-17T05:44:55.551Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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