CVE-2026-89844 (GCVE-0-2026-89844)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-10-19 08:53
VLAI
Title
scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition qla24xx_report_id_acquisition() format-1 handling drops vport_slock after taking the vport reference and then calls qla_update_host_map() without the lock. That reaches qla_update_vp_map(), which mutates the ha->host_map btree via btree_insert32()/btree_update32()/btree_remove32() and is documented to require vport_slock to be held by the caller. Running it unlocked can race concurrent host_map updates and corrupt the btree. The format-2 path in the same function already wraps its host_map update (SET_AL_PA) in vport_slock; the format-1 path is the lone outlier. Hold vport_slock across the format-1 qla_update_host_map() call to honor the documented locking contract. The vref_count taken in the loop keeps the vport valid, so this only adds the missing host_map serialization.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 430eef03a763e5e76a371ba6d02779ae4a64b6ea , < e8f1b0cb9782338c6341ceed816e9c1243743cdd (git)
Affected: 430eef03a763e5e76a371ba6d02779ae4a64b6ea , < 6ed66e2a67bbd22877008ff9aa64bd574a7fc011 (git)
Affected: 430eef03a763e5e76a371ba6d02779ae4a64b6ea , < 776e4e8cbcf155302f430ce9793d1502e3c113a0 (git)
Affected: 430eef03a763e5e76a371ba6d02779ae4a64b6ea , < 7d0b3f745efb24c0aac5e06b49b3420bc65d23b9 (git)
Affected: 430eef03a763e5e76a371ba6d02779ae4a64b6ea , < 7944039ba9cb5c3a935d17c91004e3b8649ff58e (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition\n\nqla24xx_report_id_acquisition() format-1 handling drops vport_slock after\ntaking the vport reference and then calls qla_update_host_map() without\nthe lock. That reaches qla_update_vp_map(), which mutates the ha-\u003ehost_map\nbtree via btree_insert32()/btree_update32()/btree_remove32() and is\ndocumented to require vport_slock to be held by the caller. Running it\nunlocked can race concurrent host_map updates and corrupt the btree.\n\nThe format-2 path in the same function already wraps its host_map update\n(SET_AL_PA) in vport_slock; the format-1 path is the lone outlier.\n\nHold vport_slock across the format-1 qla_update_host_map() call to honor\nthe documented locking contract. The vref_count taken in the loop keeps\nthe vport valid, so this only adds the missing host_map serialization."
        }
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            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
          "scenarios": [
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              "lang": "en",
              "value": "AV:A - qla24xx_report_id_acquisition() runs from qla2xxx response and ATIO interrupt paths when firmware reports NPIV N_Port ID acquisition or VP_STAT_ID_CHG after fabric FDISC. A peer or switch on the same Fibre Channel SAN can drive those events; FC is a non-routable fabric, so Adjacent is the highest defensible vector.\nAC:L - A fabric attacker can bounce the link or induce ID changes so multiple NPIV ports re-acquire IDs while the ATIO MSI-X path (atio_lock) and the response-queue path both call qla_update_host_map() on the shared ha-\u003ehost_map btree. The attacker drives both sides of that race and can retry at fabric-event rate.\nPR:N - Report-ID IOCBs are firmware completions of unauthenticated Fibre Channel fabric login and ID assignment. The path checks no Linux credentials or capabilities on the victim host; FC-SP/EDIF is opt-in and not required.\nUI:N - Host-map updates run automatically in interrupt context when the HBA logs NPIV ports into the fabric or the fabric changes a VP ID. No user or administrator action such as mounting a device is required.\nS:U - Concurrent btree mutation corrupts qla2xxx host-map and kernel heap state inside the same host kernel security authority. This is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - Unlocked btree_insert32/update32/remove32 on ha-\u003ehost_map can free or reuse btree nodes while another CPU walks them, and the tree stores scsi_qla_host pointers consumed by qla_find_host_by_d_id(). That is UAF-class heap corruption enabling kernel memory disclosure.\nI:H - The same unlocked btree mutation can corrupt node pointers, double-free mempool objects via btree_shrink(), and install attacker-influenced scsi_qla_host pointers used to dispatch incoming FCP/ATIO commands, yielding write and control-flow primitives.\nA:H - lib/btree.c BUG_ON()s on inconsistent nodes, and a corrupted host_map causes oopses in interrupt context when ATIO or response processing dereferences a bad vha pointer, panicking the storage host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:53:37.236Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89844",
    "datePublished": "2026-09-16T10:31:18.439Z",
    "dateReserved": "2026-09-11T19:38:34.770Z",
    "dateUpdated": "2026-10-19T08:53:37.236Z",
    "state": "PUBLISHED"
  },
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      "cve": "CVE-2026-89844",
      "id": "msrc_CVE-2026-89844",
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      "product_status:fixed": "1",
      "product_status:known_affected": "2",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition\n\nqla24xx_report_id_acquisition() format-1 handling drops vport_slock after\ntaking the vport reference and then calls qla_update_host_map() without\nthe lock. That reaches qla_update_vp_map(), which mutates the ha-\u003ehost_map\nbtree via btree_insert32()/btree_update32()/btree_remove32() and is\ndocumented to require vport_slock to be held by the caller. Running it\nunlocked can race concurrent host_map updates and corrupt the btree.\n\nThe format-2 path in the same function already wraps its host_map update\n(SET_AL_PA) in vport_slock; the format-1 path is the lone outlier.\n\nHold vport_slock across the format-1 qla_update_host_map() call to honor\nthe documented locking contract. The vref_count taken in the loop keeps\nthe vport valid, so this only adds the missing host_map serialization."
          }
        ],
        "id": "CVE-2026-89844",
        "lastModified": "2026-10-19T09:18:28.360",
        "metrics": {
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                "attackVector": "ADJACENT_NETWORK",
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                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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        "vulnStatus": "Received"
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      "current_release_date": "2026-11-06T01:24:38+00:00",
      "cve": "CVE-2026-89844",
      "id": "CVE-2026-89844",
      "initial_release_date": "2026-09-16T00:00:00+00:00",
      "product_status:known_affected": "174",
      "product_status:known_not_affected": "29",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: qla2xxx: Hold vport_slock for host map update in report ID acquisition",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89844.json",
      "version": "3"
    }
  }
}



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