CVE-2026-89849 (GCVE-0-2026-89849)
Vulnerability from cvelistv5
Published
2026-09-16 10:31
Modified
2026-10-19 08:53
Severity ?
8.8 (High) - CVSS:3.1/AV:A/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: scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path qla2x00_status_entry() filters out non-TYPE_SRB entries and the SRB_NVME_CMD, SRB_BIDI_CMD and SRB_TM_CMD types, then falls through to a SCSI fast path that assumes the command is an SRB_SCSI_CMD. The first thing on that path, qla_chk_edif_rx_sa_delete_pending(), and the subsequent handling both evaluate GET_CMD_SP(sp), i.e. sp->u.scmd.cmd. The srb u union overlays the SCSI command pointer with other command layouts (bsg_job, iocb_cmd). If firmware delivers an unexpected STATUS_TYPE IOCB for a non-SCSI handle, sp->u.scmd.cmd can read as a non-NULL garbage pointer, bypassing the NULL checks in qla_chk_edif_rx_sa_delete_pending() and at the cp == NULL test, and leading to a wild pointer dereference. Reject any SRB whose type is not SRB_SCSI_CMD before entering the fast path. The outstanding_cmds slot is left untouched so a genuinely non-SCSI command still completes through its proper handler.
References
Impacted products
Vendor Product Version
Linux Linux Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
Version: dd30706e73b70d67e88fdaca688db7a3374fd5de
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_dbg.c",
            "drivers/scsi/qla2xxx/qla_isr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9204fb0888374083be74f799049649a17eab4191",
              "status": "affected",
              "version": "dd30706e73b70d67e88fdaca688db7a3374fd5de",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "dd30706e73b70d67e88fdaca688db7a3374fd5de",
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            },
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              "version": "dd30706e73b70d67e88fdaca688db7a3374fd5de",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_dbg.c",
            "drivers/scsi/qla2xxx/qla_isr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path\n\nqla2x00_status_entry() filters out non-TYPE_SRB entries and the\nSRB_NVME_CMD, SRB_BIDI_CMD and SRB_TM_CMD types, then falls through to a\nSCSI fast path that assumes the command is an SRB_SCSI_CMD. The first\nthing on that path, qla_chk_edif_rx_sa_delete_pending(), and the\nsubsequent handling both evaluate GET_CMD_SP(sp), i.e. sp-\u003eu.scmd.cmd.\n\nThe srb u union overlays the SCSI command pointer with other command\nlayouts (bsg_job, iocb_cmd). If firmware delivers an unexpected\nSTATUS_TYPE IOCB for a non-SCSI handle, sp-\u003eu.scmd.cmd can read as a\nnon-NULL garbage pointer, bypassing the NULL checks in\nqla_chk_edif_rx_sa_delete_pending() and at the cp == NULL test, and\nleading to a wild pointer dereference.\n\nReject any SRB whose type is not SRB_SCSI_CMD before entering the fast\npath. The outstanding_cmds slot is left untouched so a genuinely\nnon-SCSI command still completes through its proper handler."
        }
      ],
      "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 - qla2xxx processes STATUS_TYPE IOCBs from the Fibre Channel/FCoE HBA response queue in interrupt context. A peer on the same SAN fabric can keep non-SCSI SRBs (login, CT, NACK, NVMe LS) outstanding and drive firmware completions; FC is a non-routable fabric, so Adjacent is the highest defensible vector.\nAC:L - Firmware already completes several non-SCSI types (NVMe, bidirectional, task-management) via STATUS_TYPE, and the SCSI fast path was an unguarded fall-through. Once a STATUS_TYPE IOCB names a non-SCSI handle, the type confusion is deterministic, with no race or layout outside attacker influence.\nPR:N - Fibre Channel has no host authentication by default. Fabric login, nameserver CT, target-mode NACK, and I/O completions are handled in the HBA ISR/DPC with no Linux account or capability required on the victim.\nUI:N - Response-queue processing runs automatically from the HBA interrupt and qla_do_work paths. No victim mount, open, or other user action is required.\nS:U - The type confusion and wild-pointer access occur in the host kernel that owns the qla2xxx driver. This is not a VM escape, IOMMU bypass, or other cross-authority impact.\nC:H - GET_CMD_SP(sp) overlays scsi_cmnd* with other SRB union members (bsg_job*, ctarg.iocb, ntfy, sa_ctl). Treating those live kernel pointers as scsi_cmnd yields wild reads of command and sense fields, a type-confusion primitive that can be leveraged for kernel memory disclosure.\nI:H - The same type confusion writes through the forged scsi_cmnd via scsi_set_resid and memset/memcpy of firmware sense data into cp-\u003esense_buffer. Type confusion with those kernel writes is High integrity and can hijack control flow.\nA:H - Dereferencing the overlaid non-SCSI pointer as scsi_cmnd in interrupt/completion context causes a kernel oops or panic, matching related qla_chk_edif_rx_sa_delete_pending crashes on this path."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:53:42.181Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9204fb0888374083be74f799049649a17eab4191"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7418198b45b327194b97f856fe8ea8daa91f3fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f0e31e7a41376abe7d6ca7cbee07fcf9de071e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/e38041b47c29316ba79b645e2ae0b713d216b1db"
        },
        {
          "url": "https://git.kernel.org/stable/c/e93aa3c5125d9a4352ac0fa8ba4a7f8f87881805"
        },
        {
          "url": "https://git.kernel.org/stable/c/29f1f9ad9e354cd0b6e4f6fc75ba09162d6a04d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/0f41d07d72f2245208c45374ca8d0a1846cad667"
        }
      ],
      "title": "scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89849",
    "datePublished": "2026-09-16T10:31:23.180Z",
    "dateReserved": "2026-09-11T19:38:34.770Z",
    "dateUpdated": "2026-10-19T08:53:42.181Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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