CVE-2022-49089 (GCVE-0-2022-49089)
Vulnerability from cvelistv5
Published
2025-02-26 01:54
Modified
2026-08-05 08:53
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: IB/rdmavt: add lock to call to rvt_error_qp to prevent a race condition The documentation of the function rvt_error_qp says both r_lock and s_lock need to be held when calling that function. It also asserts using lockdep that both of those locks are held. However, the commit I referenced in Fixes accidentally makes the call to rvt_error_qp in rvt_ruc_loopback no longer covered by r_lock. This results in the lockdep assertion failing and also possibly in a race condition.
References
Impacted products
Vendor Product Version
Linux Linux Version: d757c60eca9b22f4d108929a24401e0fdecda0b1
Version: d757c60eca9b22f4d108929a24401e0fdecda0b1
Version: d757c60eca9b22f4d108929a24401e0fdecda0b1
Version: d757c60eca9b22f4d108929a24401e0fdecda0b1
Version: d757c60eca9b22f4d108929a24401e0fdecda0b1
Version: d757c60eca9b22f4d108929a24401e0fdecda0b1
Version: 25636de95557a95d54ac30be94af3748345a0a90
Version: 5.0.4   ≤
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rdmavt/qp.c"
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              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/rdmavt: add lock to call to rvt_error_qp to prevent a race condition\n\nThe documentation of the function rvt_error_qp says both r_lock and s_lock\nneed to be held when calling that function.  It also asserts using lockdep\nthat both of those locks are held.  However, the commit I referenced in\nFixes accidentally makes the call to rvt_error_qp in rvt_ruc_loopback no\nlonger covered by r_lock.  This results in the lockdep assertion failing\nand also possibly in a race condition."
        }
      ],
      "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 vulnerable path is rvt_ruc_loopback on the local send engine when an RC/UC QP targets the local LID (hfi1/qib software loopback), reached via ib_uverbs post_send/modify_qp syscalls\u2014not by processing remote fabric packets.\nAC:L - An unprivileged attacker who can open uverbs fully controls both sides of the race by creating multiple local loopback QPs and issuing concurrent post_send operations (one triggering the unlocked rvt_error_qp path, another using the same QP as responder under r_lock).\nPR:L - /dev/infiniband/uverbs* defaults to mode 0666, and creating/using RC QPs for post_send requires no capabilities (CAP_NET_RAW is only for raw packet/QKEY cases), so a normal local user can reach the bug.\nUI:N - Exploitation needs only the attacker\u2019s own RDMA verbs operations; no action by another user is required.\nS:U - Impact is confined to the local host kernel (memory corruption/crash/privilege escalation within the same security authority); this is not a VM escape or IOMMU boundary bypass.\nC:H - rvt_error_qp without r_lock races with concurrent receive-side use of r_sge and can double-put MRs via rvt_clear_mr_refs/rvt_put_ss, yielding a use-after-free of memory regions that can disclose arbitrary kernel/user memory.\nI:H - The same MR use-after-free and corrupted r_sge state provide a heap corruption primitive that can be leveraged for arbitrary writes and control-flow hijacking in the kernel.\nA:H - The related missing-r_lock race in this path already caused documented kernel NULL dereferences (oops/panic) in rvt_clear_mr_refs and copy_sge; the unlocked rvt_error_qp call enables the same availability-destroying crashes."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:53:50.874Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8a50937227c385a477177c9ffa122b4230e40666"
        },
        {
          "url": "https://git.kernel.org/stable/c/43c2d7890ecabe527448a6c391fb2d9a5e6bbfe0"
        },
        {
          "url": "https://git.kernel.org/stable/c/92f1947c0d26060e978b3a9f21f32ce7c8c9cca3"
        },
        {
          "url": "https://git.kernel.org/stable/c/77ffb2495a41098f9d6a14f8aefde3188da75944"
        },
        {
          "url": "https://git.kernel.org/stable/c/57800cc36e55db0547461c49acf5cd84c0f502b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d809f69695d4e7d1378b3a072fa9aef23123018"
        }
      ],
      "title": "IB/rdmavt: add lock to call to rvt_error_qp to prevent a race condition",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49089",
    "datePublished": "2025-02-26T01:54:45.743Z",
    "dateReserved": "2025-02-26T01:49:39.248Z",
    "dateUpdated": "2026-08-05T08:53:50.874Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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