CVE-2026-97527 (GCVE-0-2026-97527)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:21 – Updated: 2026-09-25 14:41
VLAI
Title
scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock The fcport->unsol_ctx_head list is modified from several contexts without a common lock. Entries are added in qla2xxx_process_purls_iocb() from the response queue ISR (under the qpair qp_lock), while they are removed from qla2xxx_process_purls_pkt() (DPC/purex worker), qla_nvme_xmt_ls_rsp() (NVMe-FC transport callback) and qla_nvme_release_lsrsp_cmd_kref() (SRB completion). The qpair qp_lock cannot serialize this per-fcport list since multiqueue adapters add entries through different qpairs, so a concurrent add and delete (or two concurrent deletes) can corrupt the list pointers. Introduce a dedicated per-fcport spinlock, unsol_ctx_lock, initialized in qla2x00_alloc_fcport(), and take it around every list_add_tail()/list_del() on unsol_ctx_head. The add nests under the existing qp_lock; no delete path takes qp_lock, so the lock order is consistent and deadlock free.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < b211d138cad86f749826d6132db6388eded992d8 (git)
Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < 4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0 (git)
Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < 76da0c43c63eb0496649e372ac64466364d0fe7d (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_def.h",
            "drivers/scsi/qla2xxx/qla_init.c",
            "drivers/scsi/qla2xxx/qla_nvme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "b211d138cad86f749826d6132db6388eded992d8",
              "status": "affected",
              "version": "875386b98857822b77ac7f95bdf367b70af5b78c",
              "versionType": "git"
            },
            {
              "lessThan": "4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0",
              "status": "affected",
              "version": "875386b98857822b77ac7f95bdf367b70af5b78c",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "875386b98857822b77ac7f95bdf367b70af5b78c",
              "versionType": "git"
            }
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_def.h",
            "drivers/scsi/qla2xxx/qla_init.c",
            "drivers/scsi/qla2xxx/qla_nvme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock\n\nThe fcport-\u003eunsol_ctx_head list is modified from several contexts without\na common lock. Entries are added in qla2xxx_process_purls_iocb() from the\nresponse queue ISR (under the qpair qp_lock), while they are removed from\nqla2xxx_process_purls_pkt() (DPC/purex worker), qla_nvme_xmt_ls_rsp()\n(NVMe-FC transport callback) and qla_nvme_release_lsrsp_cmd_kref() (SRB\ncompletion). The qpair qp_lock cannot serialize this per-fcport list since\nmultiqueue adapters add entries through different qpairs, so a concurrent\nadd and delete (or two concurrent deletes) can corrupt the list pointers.\n\nIntroduce a dedicated per-fcport spinlock, unsol_ctx_lock, initialized in\nqla2x00_alloc_fcport(), and take it around every list_add_tail()/list_del()\non unsol_ctx_head. The add nests under the existing qp_lock; no delete path\ntakes qp_lock, so the lock order is consistent and deadlock free."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - qla24xx_msix_rsp_q/qla2xxx_msix_rsp_q \u2192 qla24xx_process_response_queue dispatches PT_LS4_UNSOL (0x56) into qla2xxx_process_purls_iocb, which list_add_tail\u0027s uctx onto fcport-\u003eunsol_ctx_head. Those are unsolicited NVMe-FC LS frames a SAN N_Port put on the wire. FC/FCoE is a non-routable fabric, so Adjacent.\nAC:L - A fabric peer floods concurrent PT_LS4_UNSOL so ISR list_add_tail in qla2xxx_process_purls_iocb (qp_lock only; different qpairs on MQ) races list_del in qla2xxx_process_purls_pkt (DPC; nvme_fc_rcv_ls_req -E2BIG on oversized LS), qla_nvme_xmt_ls_rsp, or qla_nvme_release_lsrsp_cmd_kref. The attacker drives both sides.\nPR:N - qla2xxx_process_purls_iocb only needs qla2x00_find_fcport_by_nportid to match a non-deleted N_Port that completed NVMe PRLI (nvme_remote_port). The PT_LS4_UNSOL path has no uid, capability, or EDIF check; fabric zoning is network access, not a host privilege.\nUI:N - PT_LS4_UNSOL is consumed in the MSI-X response-queue handler and queued via qla24xx_queue_purex_item to PROCESS_PUREX_IOCB; nvme_fc later calls qla_nvme_xmt_ls_rsp from lsrcv_work. No victim mount, open, or other interactive step is required.\nS:U - Corrupting fcport-\u003eunsol_ctx_head and the qla_nvme_unsol_ctx list nodes stays inside the host kernel that owns the qla2xxx adapter. This is not a VM escape, IOMMU bypass, or other cross-authority impact.\nC:H - Unlocked list_add_tail versus list_del on unsol_ctx_head can leave head-\u003eprev pointing at a qla_nvme_unsol_ctx that qla2xxx_process_purls_pkt already kfree\u0027d, so the next add writes through freed slab. Reuse of that uctx is an arbitrary kernel read primitive.\nI:H - The same race lets list_del write prev/next of a neighbor uctx or the list head through a stale pointer, and a second delete of a poisoned node writes LIST_POISON or a reused object, which is a kernel write and control-flow hijack primitive.\nA:H - list_del on a corrupted unsol_ctx_head hits LIST_POISON or a bad dereference in qla2xxx_process_purls_pkt, qla_nvme_xmt_ls_rsp, or qla_nvme_release_lsrsp_cmd_kref and oopses or panics the host, taking down the NVMe-FC path."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T14:41:07.548Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b211d138cad86f749826d6132db6388eded992d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/76da0c43c63eb0496649e372ac64466364d0fe7d"
        }
      ],
      "title": "scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97527",
    "datePublished": "2026-09-25T10:21:29.521Z",
    "dateReserved": "2026-09-24T16:01:01.152Z",
    "dateUpdated": "2026-09-25T14:41:07.548Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-97527",
      "date": "2026-09-28",
      "epss": "0.00318",
      "percentile": "0.22255"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-28T00:26:08.000Z",
      "cve": "CVE-2026-97527",
      "id": "msrc_CVE-2026-97527",
      "initial_release_date": "2026-09-28T00:26:08.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-97527.json",
      "version": "1"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/scsi/qla2xxx/qla_def.h",
                  "drivers/scsi/qla2xxx/qla_init.c",
                  "drivers/scsi/qla2xxx/qla_nvme.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
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                    "status": "affected",
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                    "versionType": "git"
                  },
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                    "status": "affected",
                    "version": "875386b98857822b77ac7f95bdf367b70af5b78c",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/scsi/qla2xxx/qla_def.h",
                  "drivers/scsi/qla2xxx/qla_init.c",
                  "drivers/scsi/qla2xxx/qla_nvme.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.6"
                  },
                  {
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                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.53",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.7",
                    "versionType": "semver"
                  },
                  {
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                    "status": "unaffected",
                    "version": "7.3-rc1",
                    "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\nscsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock\n\nThe fcport-\u003eunsol_ctx_head list is modified from several contexts without\na common lock. Entries are added in qla2xxx_process_purls_iocb() from the\nresponse queue ISR (under the qpair qp_lock), while they are removed from\nqla2xxx_process_purls_pkt() (DPC/purex worker), qla_nvme_xmt_ls_rsp()\n(NVMe-FC transport callback) and qla_nvme_release_lsrsp_cmd_kref() (SRB\ncompletion). The qpair qp_lock cannot serialize this per-fcport list since\nmultiqueue adapters add entries through different qpairs, so a concurrent\nadd and delete (or two concurrent deletes) can corrupt the list pointers.\n\nIntroduce a dedicated per-fcport spinlock, unsol_ctx_lock, initialized in\nqla2x00_alloc_fcport(), and take it around every list_add_tail()/list_del()\non unsol_ctx_head. The add nests under the existing qp_lock; no delete path\ntakes qp_lock, so the lock order is consistent and deadlock free."
          }
        ],
        "id": "CVE-2026-97527",
        "lastModified": "2026-09-25T15:17:58.053",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-25T11:17:02.873",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/76da0c43c63eb0496649e372ac64466364d0fe7d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b211d138cad86f749826d6132db6388eded992d8"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-28T20:11:13+00:00",
      "cve": "CVE-2026-97527",
      "id": "CVE-2026-97527",
      "initial_release_date": "2026-09-25T00:00:00+00:00",
      "product_status:known_affected": "245",
      "product_status:known_not_affected": "31",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97527.json",
      "version": "3"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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