Vulnerability-Lookup

CVE-2026-98367 (GCVE-0-2026-98367)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-07 06:50

Title

RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept We need to clear cep before release state_lock as siw_qp_llp_close and siw_qp_modify->siw_qp_llp_close did. Otherwise if siw_qp_modify() fails in siw_accept(), the QP's state_lock is released before the error path cleanup. A concurrent ibv_modify_qp() transitioning the QP to ERROR can race in this window: siw_accept() ibv_modify_qp(ERROR) ---------------------- ---------------------- siw_qp_modify() fails up_write(&qp->state_lock) down_write(&qp->state_lock) nextstate_from_idle(): if (qp->cep) siw_cep_put(qp->cep) <- frees cep qp->cep = NULL goto error cep->qp = NULL <- UAF Clear qp->cep and drop the association reference taken by siw_cep_get(), all under the write lock held from the initial down_write(&qp->state_lock). Thread B therefore sees qp->cep == NULL, skips its own put, and cannot free the cep before siw_accept() is done with it.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/f11e09fe2fc3a11cc…
https://git.kernel.org/stable/c/e3f039082856adab7…
https://git.kernel.org/stable/c/ad50d19f3d1ce052b…
https://git.kernel.org/stable/c/030306bbb9273af80…
https://git.kernel.org/stable/c/df2584750314336ed…
https://git.kernel.org/stable/c/9dcc0f4e488b70cff…
https://git.kernel.org/stable/c/bfdc744bf20ae4c3e…
https://git.kernel.org/stable/c/32cd87f54dd107002…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078 (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < e3f039082856adab7e195dea1af45d93dd6a3f1c (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < ad50d19f3d1ce052b3a146143581e930a1efb33e (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < 030306bbb9273af80f14d7af20129661964cd9a7 (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < df2584750314336edcbcc21fb388e04b260f35b7 (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < 9dcc0f4e488b70cff81e0e5717a498c929cf5de3 (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < bfdc744bf20ae4c3ef2e470298de5237c5c9a13c (git) Affected: 6c52fdc244b5ccc468006fd65a504d4ee33743c7 , < 32cd87f54dd1070020e664ccb0312a9f0fea79b4 (git)	guessed
Linux	Linux	Affected: 5.3 Unaffected: 0 , < 5.3 (semver) Unaffected: 5.10.271 , ≤ 5.10.* (semver) Unaffected: 5.15.222 , ≤ 5.15.* (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/siw/siw_cm.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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            {
              "lessThan": "e3f039082856adab7e195dea1af45d93dd6a3f1c",
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            },
            {
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              "versionType": "git"
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              "version": "5.3"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.271",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc4",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept\n\nWe need to clear cep before release state_lock as siw_qp_llp_close and\nsiw_qp_modify-\u003esiw_qp_llp_close did.\n\nOtherwise if siw_qp_modify() fails in siw_accept(), the QP\u0027s state_lock\nis released before the error path cleanup. A concurrent ibv_modify_qp()\ntransitioning the QP to ERROR can race in this window:\n\n  siw_accept()                       ibv_modify_qp(ERROR)\n  ----------------------             ----------------------\n  siw_qp_modify() fails\n  up_write(\u0026qp-\u003estate_lock)\n                                     down_write(\u0026qp-\u003estate_lock)\n                                     nextstate_from_idle():\n\t\t\t\t     if (qp-\u003ecep)\n                                       siw_cep_put(qp-\u003ecep) \u003c- frees cep\n                                       qp-\u003ecep = NULL\n  goto error\n    cep-\u003eqp = NULL                   \u003c- UAF\n\nClear qp-\u003ecep and drop the association reference taken by siw_cep_get(),\nall under the write lock held from the initial down_write(\u0026qp-\u003estate_lock).\nThread B therefore sees qp-\u003ecep == NULL, skips its own put, and cannot free\nthe cep before siw_accept() is done with it."
        }
      ],
      "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 - siw_accept() is called through the ops.iw_accept hook from iw_cm_accept(), which a local process reaches with the RDMA_USER_CM_CMD_ACCEPT command on /dev/infiniband/rdma_cm. The racing side is the uverbs MODIFY_QP command (ibv_modify_qp to ERROR), also local. No wire message carries data that causes the siw_qp_modify() failure, so the attack is local.\nAC:L - The attacker does control both racing threads, since it owns the QP and issues the accept and modify_qp calls itself. Even so, AC is High: in siw_accept the only way siw_qp_modify() can fail is siw_qp_readq_init() hitting a vcalloc() ENOMEM, and IRD/ORD are capped at 128, so the allocations are small. That failure depends on system-wide memory exhaustion, which the attacker cannot produce on demand.\nPR:L - Running rdma_accept and ibv_modify_qp on a QP the user created on an existing siw device needs only ordinary access to the rdma_cm and uverbs device nodes. Creating the siw link through RDMA_NLDEV_CMD_NEWLINK is admin-only, but no privilege is needed to use a device that already exists.\nUI:N - The attacker drives both siw_accept() and the concurrent ibv_modify_qp(ERROR) through their own rdma_cm and verbs calls, and the connecting peer can be the attacker over loopback. No other user has to do anything.\nS:U - The freed siw_cep and the writes into it both stay inside the kernel\u0027s own security authority. No VM, IOMMU or sandbox boundary is crossed.\nC:H - siw_qp_nextstate_from_idle() frees the siw_cep by calling siw_cep_put(qp-\u003ecep). The error path in siw_accept() then keeps using that freed object: it writes cep-\u003eqp = NULL, runs siw_free_cm_id, and calls siw_cep_set_free_and_put. A reclaimed object in that slot gives the attacker a use-after-free primitive that can be built into a kernel memory leak.\nI:H - After the free, the error path writes cep-\u003eqp = NULL and does kref and lock operations on the dead siw_cep. That corrupts whatever object has taken over the slot, and this kind of UAF write can be used to corrupt kernel data or hijack control flow.\nA:H - A kref_put or lock operation on the freed siw_cep in siw_cep_set_free_and_put can corrupt the slab or oops the kernel, and that crashes the host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T06:50:20.775Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e"
        },
        {
          "url": "https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3"
        },
        {
          "url": "https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c"
        },
        {
          "url": "https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4"
        }
      ],
      "title": "RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98367",
    "datePublished": "2026-10-06T08:46:52.452Z",
    "dateReserved": "2026-09-25T10:25:14.344Z",
    "dateUpdated": "2026-10-07T06:50:20.775Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98367",
      "date": "2026-10-07",
      "epss": "0.00129",
      "percentile": "0.02214"
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    "nvd": {
      "cve": {
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            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
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                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "lessThan": "f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078",
                    "status": "affected",
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                    "versionType": "git"
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                  {
                    "lessThan": "e3f039082856adab7e195dea1af45d93dd6a3f1c",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "ad50d19f3d1ce052b3a146143581e930a1efb33e",
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                    "versionType": "git"
                  },
                  {
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                    "versionType": "git"
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                "product": "Linux",
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                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.3"
                  },
                  {
                    "lessThan": "5.3",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.271",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.222",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.189",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.158",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.112",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.54",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.8",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc4",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept\n\nWe need to clear cep before release state_lock as siw_qp_llp_close and\nsiw_qp_modify-\u003esiw_qp_llp_close did.\n\nOtherwise if siw_qp_modify() fails in siw_accept(), the QP\u0027s state_lock\nis released before the error path cleanup. A concurrent ibv_modify_qp()\ntransitioning the QP to ERROR can race in this window:\n\n  siw_accept()                       ibv_modify_qp(ERROR)\n  ----------------------             ----------------------\n  siw_qp_modify() fails\n  up_write(\u0026qp-\u003estate_lock)\n                                     down_write(\u0026qp-\u003estate_lock)\n                                     nextstate_from_idle():\n\t\t\t\t     if (qp-\u003ecep)\n                                       siw_cep_put(qp-\u003ecep) \u003c- frees cep\n                                       qp-\u003ecep = NULL\n  goto error\n    cep-\u003eqp = NULL                   \u003c- UAF\n\nClear qp-\u003ecep and drop the association reference taken by siw_cep_get(),\nall under the write lock held from the initial down_write(\u0026qp-\u003estate_lock).\nThread B therefore sees qp-\u003ecep == NULL, skips its own put, and cannot free\nthe cep before siw_accept() is done with it."
          }
        ],
        "id": "CVE-2026-98367",
        "lastModified": "2026-10-07T07:17:11.103",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-06T09:18:30.970",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}

FKIE_CVE-2026-98367

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-07 07:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/siw/siw_cm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "e3f039082856adab7e195dea1af45d93dd6a3f1c",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "ad50d19f3d1ce052b3a146143581e930a1efb33e",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "030306bbb9273af80f14d7af20129661964cd9a7",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "df2584750314336edcbcc21fb388e04b260f35b7",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "9dcc0f4e488b70cff81e0e5717a498c929cf5de3",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "bfdc744bf20ae4c3ef2e470298de5237c5c9a13c",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            },
            {
              "lessThan": "32cd87f54dd1070020e664ccb0312a9f0fea79b4",
              "status": "affected",
              "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/siw/siw_cm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept\n\nWe need to clear cep before release state_lock as siw_qp_llp_close and\nsiw_qp_modify-\u003esiw_qp_llp_close did.\n\nOtherwise if siw_qp_modify() fails in siw_accept(), the QP\u0027s state_lock\nis released before the error path cleanup. A concurrent ibv_modify_qp()\ntransitioning the QP to ERROR can race in this window:\n\n  siw_accept()                       ibv_modify_qp(ERROR)\n  ----------------------             ----------------------\n  siw_qp_modify() fails\n  up_write(\u0026qp-\u003estate_lock)\n                                     down_write(\u0026qp-\u003estate_lock)\n                                     nextstate_from_idle():\n\t\t\t\t     if (qp-\u003ecep)\n                                       siw_cep_put(qp-\u003ecep) \u003c- frees cep\n                                       qp-\u003ecep = NULL\n  goto error\n    cep-\u003eqp = NULL                   \u003c- UAF\n\nClear qp-\u003ecep and drop the association reference taken by siw_cep_get(),\nall under the write lock held from the initial down_write(\u0026qp-\u003estate_lock).\nThread B therefore sees qp-\u003ecep == NULL, skips its own put, and cannot free\nthe cep before siw_accept() is done with it."
    }
  ],
  "id": "CVE-2026-98367",
  "lastModified": "2026-10-07T07:17:11.103",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-06T09:18:30.970",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-WHP9-3996-XQG3

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-07 09:32

Details

In the Linux kernel, the following vulnerability has been resolved:

RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept

We need to clear cep before release state_lock as siw_qp_llp_close and siw_qp_modify->siw_qp_llp_close did.

Otherwise if siw_qp_modify() fails in siw_accept(), the QP's state_lock is released before the error path cleanup. A concurrent ibv_modify_qp() transitioning the QP to ERROR can race in this window:

siw_accept() ibv_modify_qp(ERROR) ---------------------- ---------------------- siw_qp_modify() fails up_write(&qp->state_lock) down_write(&qp->state_lock) nextstate_from_idle(): if (qp->cep) siw_cep_put(qp->cep) <- frees cep qp->cep = NULL goto error cep->qp = NULL <- UAF

Clear qp->cep and drop the association reference taken by siw_cep_get(), all under the write lock held from the initial down_write(&qp->state_lock). Thread B therefore sees qp->cep == NULL, skips its own put, and cannot free the cep before siw_accept() is done with it.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-98367"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:30Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept\n\nWe need to clear cep before release state_lock as siw_qp_llp_close and\nsiw_qp_modify-\u003esiw_qp_llp_close did.\n\nOtherwise if siw_qp_modify() fails in siw_accept(), the QP\u0027s state_lock\nis released before the error path cleanup. A concurrent ibv_modify_qp()\ntransitioning the QP to ERROR can race in this window:\n\n  siw_accept()                       ibv_modify_qp(ERROR)\n  ----------------------             ----------------------\n  siw_qp_modify() fails\n  up_write(\u0026qp-\u003estate_lock)\n                                     down_write(\u0026qp-\u003estate_lock)\n                                     nextstate_from_idle():\n\t\t\t\t     if (qp-\u003ecep)\n                                       siw_cep_put(qp-\u003ecep) \u003c- frees cep\n                                       qp-\u003ecep = NULL\n  goto error\n    cep-\u003eqp = NULL                   \u003c- UAF\n\nClear qp-\u003ecep and drop the association reference taken by siw_cep_get(),\nall under the write lock held from the initial down_write(\u0026qp-\u003estate_lock).\nThread B therefore sees qp-\u003ecep == NULL, skips its own put, and cannot free\nthe cep before siw_accept() is done with it.",
  "id": "GHSA-whp9-3996-xqg3",
  "modified": "2026-10-07T09:32:17Z",
  "published": "2026-10-06T09:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98367"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-98367

Vulnerability from csaf_microsoft - Published: 2026-10-07 01:31 - Updated: 2026-10-07 01:31

Summary

RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept

Scope

1 vulnerability in this advisory, including CVE-2026-98367.

CVE-2026-98367

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-98367 (GCVE-0-2026-98367)

FKIE_CVE-2026-98367

GHSA-WHP9-3996-XQG3

MSRC_CVE-2026-98367

Tags

Sightings

Nomenclature

Related by attack behaviour