CVE-2026-89852 (GCVE-0-2026-89852)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 10:31
VLAI
Title
scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state() The mbx_cmd_t is allocated on the stack but left uninitialized. qla2x00_mailbox_command() has several early-return paths (PCI permanent failure, device failed, EEH busy, ISP abort pending, mailbox access timeout, purge mbox) that return without writing the input mailbox registers back into mcp->mb[]. qla2x00_get_firmware_state() then unconditionally copies mcp->mb[1..6] (and mb[12]) into the caller's states[] array regardless of the return value. On such a failure the copied values are uninitialized kernel stack memory, which is then exposed to userspace via the fw_state and mpi_fw_state sysfs handlers. Zero the mailbox struct so a failed query yields deterministic zeroed state instead of leaking stack contents.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < f8fc5cc6b3284506c6ab83c822c48133377668bb (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < f29695b1138ae2539c5cd6cdaba9b1b072aaa81a (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < 13d645a2cdb224d27205368f3e3c68bb160daf97 (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < 2f847f06bb223aa895eea91fc9e5e2d6314038eb (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < 1f49e861c18caf8eef7f0ad9a2c5034f88a6ba79 (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < e6cfb1ee18336aab41a0941d6d3ea5009aaafc05 (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < 9f31de4d07e4cde91dfc24522993a5fbb4d67083 (git)
Affected: 4d4df1932b6b116aecc81039066fec27f2050762 , < 9efaa782845b4d5fb3e01242be0d06ebc7428d8f (git)
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Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (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-rc1 , ≤ * (original_commit_for_fix)
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()\n\nThe mbx_cmd_t is allocated on the stack but left uninitialized.\nqla2x00_mailbox_command() has several early-return paths (PCI permanent\nfailure, device failed, EEH busy, ISP abort pending, mailbox access\ntimeout, purge mbox) that return without writing the input mailbox\nregisters back into mcp-\u003emb[]. qla2x00_get_firmware_state() then\nunconditionally copies mcp-\u003emb[1..6] (and mb[12]) into the caller\u0027s\nstates[] array regardless of the return value.\n\nOn such a failure the copied values are uninitialized kernel stack\nmemory, which is then exposed to userspace via the fw_state and\nmpi_fw_state sysfs handlers. Zero the mailbox struct so a failed query\nyields deterministic zeroed state instead of leaking stack contents."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:31:26.012Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/f8fc5cc6b3284506c6ab83c822c48133377668bb"
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        {
          "url": "https://git.kernel.org/stable/c/f29695b1138ae2539c5cd6cdaba9b1b072aaa81a"
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          "url": "https://git.kernel.org/stable/c/13d645a2cdb224d27205368f3e3c68bb160daf97"
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        }
      ],
      "title": "scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89852",
    "datePublished": "2026-09-16T10:31:26.012Z",
    "dateReserved": "2026-09-11T19:38:34.770Z",
    "dateUpdated": "2026-09-16T10:31:26.012Z",
    "state": "PUBLISHED"
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      "date": "2026-09-25",
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      "cve": "CVE-2026-89852",
      "id": "msrc_CVE-2026-89852",
      "initial_release_date": "2026-09-17T01:10:03.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()\n\nThe mbx_cmd_t is allocated on the stack but left uninitialized.\nqla2x00_mailbox_command() has several early-return paths (PCI permanent\nfailure, device failed, EEH busy, ISP abort pending, mailbox access\ntimeout, purge mbox) that return without writing the input mailbox\nregisters back into mcp-\u003emb[]. qla2x00_get_firmware_state() then\nunconditionally copies mcp-\u003emb[1..6] (and mb[12]) into the caller\u0027s\nstates[] array regardless of the return value.\n\nOn such a failure the copied values are uninitialized kernel stack\nmemory, which is then exposed to userspace via the fw_state and\nmpi_fw_state sysfs handlers. Zero the mailbox struct so a failed query\nyields deterministic zeroed state instead of leaking stack contents."
          }
        ],
        "id": "CVE-2026-89852",
        "lastModified": "2026-09-16T11:16:52.900",
        "metrics": {},
        "published": "2026-09-16T11:16:52.900",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
          {
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            "url": "https://git.kernel.org/stable/c/f8fc5cc6b3284506c6ab83c822c48133377668bb"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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