Vulnerability-Lookup

CVE-2026-89856 (GCVE-0-2026-89856)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 14:39

Title

scsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation ha->msix_count is u16, but ha->max_req_queues, ha->max_rsp_queues and ha->max_qpairs are u8. Deriving the queue count as "ha->max_req_queues = ha->msix_count - 1" therefore truncates: a board (or a misconfigured/malicious hot-plugged device) advertising 257 MSI-X vectors yields msix_count - 1 == 256, which truncates to 0. An MSI-X count of 1 zeroes it as well, and in target mode the subsequent "ha->max_req_queues--" then underflows 0 to 255. When the count is 0, qla2x00_alloc_queues() calls kzalloc_objs(struct req_que *, 0), which returns ZERO_SIZE_PTR. That is not NULL, so the allocation check passes and the following "ha->req_q_map[0] = req" dereferences ZERO_SIZE_PTR, corrupting memory or crashing the kernel. Add qla_calc_queue_count() to clamp the derived value into [1, QLA_MAX_QUEUES - 1] so it always fits in u8 and is never zero, and use it at all three derivation sites (qla25xx_iospace_config(), qla83xx_iospace_config() and qla24xx_enable_msix()). Also guard the target-mode decrement so it cannot reintroduce a zero (which would in turn underflow max_qpairs).

Severity

8.4 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/cf623d32761b00f22…
https://git.kernel.org/stable/c/9eeddbeaa896f39d9…
https://git.kernel.org/stable/c/802068b9b683b8008…
https://git.kernel.org/stable/c/e80adfeac61b4d5db…
https://git.kernel.org/stable/c/2efe50b2da8299090…
https://git.kernel.org/stable/c/7a448f5ed0b283dbd…
https://git.kernel.org/stable/c/33c77254e6e91f37c…
https://git.kernel.org/stable/c/ebfd35c64433821bd…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: d74595278f4ab192af66d9e60a9087464638beee , < cf623d32761b00f221a9cfded3303d56e84b429d (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < 9eeddbeaa896f39d943644b16d83a6ad0ceab255 (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < 802068b9b683b8008fcccbf6e9ad133e597ec87c (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < e80adfeac61b4d5db7ffe0f5af43999c33a4145e (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < 2efe50b2da829909023de4a2eb87badb7cfa53cc (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < 7a448f5ed0b283dbde4e9183dd1e98c221432dab (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < 33c77254e6e91f37c72c7fad4051777452b10de8 (git) Affected: d74595278f4ab192af66d9e60a9087464638beee , < ebfd35c64433821bd5619a6d07ccc2df8b5b1de3 (git)	guessed
Linux	Linux	Affected: 4.10 Unaffected: 0 , < 4.10 (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)	guessed

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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_inline.h",
            "drivers/scsi/qla2xxx/qla_isr.c",
            "drivers/scsi/qla2xxx/qla_os.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "defaultStatus": "affected",
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          "programFiles": [
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            "drivers/scsi/qla2xxx/qla_isr.c",
            "drivers/scsi/qla2xxx/qla_os.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
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          "nodes": [
            {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation\n\nha-\u003emsix_count is u16, but ha-\u003emax_req_queues, ha-\u003emax_rsp_queues and\nha-\u003emax_qpairs are u8. Deriving the queue count as\n\"ha-\u003emax_req_queues = ha-\u003emsix_count - 1\" therefore truncates: a board\n(or a misconfigured/malicious hot-plugged device) advertising 257 MSI-X\nvectors yields msix_count - 1 == 256, which truncates to 0. An MSI-X\ncount of 1 zeroes it as well, and in target mode the subsequent\n\"ha-\u003emax_req_queues--\" then underflows 0 to 255.\n\nWhen the count is 0, qla2x00_alloc_queues() calls\nkzalloc_objs(struct req_que *, 0), which returns ZERO_SIZE_PTR. That is\nnot NULL, so the allocation check passes and the following\n\"ha-\u003ereq_q_map[0] = req\" dereferences ZERO_SIZE_PTR, corrupting memory\nor crashing the kernel.\n\nAdd qla_calc_queue_count() to clamp the derived value into\n[1, QLA_MAX_QUEUES - 1] so it always fits in u8 and is never zero, and\nuse it at all three derivation sites (qla25xx_iospace_config(),\nqla83xx_iospace_config() and qla24xx_enable_msix()). Also guard the\ntarget-mode decrement so it cannot reintroduce a zero (which would in\nturn underflow max_qpairs)."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is in qla2xxx PCI probe (qla2x00_probe_one \u2192 iospace_config/qla24xx_enable_msix \u2192 qla2x00_alloc_queues). QLogic FC HBAs are local PCI devices in storage servers, blades, and SAN hosts; a board or compromised adapter advertising a truncating MSI-X count triggers it at bind. Not a network/FC-frame path; local PCI is higher severity than physical hotplug.\nAC:L - The attacker-controlled PCI MSI-X vector count (config word or pci_msix_vec_count) is stored in u8 max_req_queues. Advertising 1 or 257+ vectors deterministically truncates that count to 0 and underflows max_qpairs to 255; no race or uninfluenced layout is required.\nPR:N - Probe reads the MSI-X count from the adapter and autoloads qla2xxx on matching QLogic PCI IDs with no capability or credential check. A malicious, misconfigured, or firmware-compromised HBA needs no Linux account or init-namespace privilege.\nUI:N - qla2x00_probe_one runs automatically on PCI enumeration at boot or hotplug bind; no victim must mount a filesystem, open a device node, or otherwise interact.\nS:U - The ZERO_SIZE_PTR store and any resulting oops or privilege escalation remain in the host kernel qla2xxx probe path, the same security authority. This is not a VM escape or IOMMU/DMA boundary bypass.\nC:H - qla2x00_alloc_queues() writes request/response queue pointers through ZERO_SIZE_PTR and can desynchronize u8 queue maps versus MSI-X arrays (0 versus underflowed 255 qpairs). That kernel memory corruption can be leveraged for information disclosure.\nI:H - The wild write of kernel pointers through ZERO_SIZE_PTR, plus the u8 underflow that sizes queue-pair maps to 255 while the request map is a zero-size sentinel, is an out-of-bounds write exploitable for corruption and control-flow hijacking.\nA:H - Dereferencing ZERO_SIZE_PTR is defined to take a distinct access fault, so a malicious MSI-X count causes a kernel oops or panic during probe."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T14:39:20.700Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cf623d32761b00f221a9cfded3303d56e84b429d"
        },
        {
          "url": "https://git.kernel.org/stable/c/9eeddbeaa896f39d943644b16d83a6ad0ceab255"
        },
        {
          "url": "https://git.kernel.org/stable/c/802068b9b683b8008fcccbf6e9ad133e597ec87c"
        },
        {
          "url": "https://git.kernel.org/stable/c/e80adfeac61b4d5db7ffe0f5af43999c33a4145e"
        },
        {
          "url": "https://git.kernel.org/stable/c/2efe50b2da829909023de4a2eb87badb7cfa53cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a448f5ed0b283dbde4e9183dd1e98c221432dab"
        },
        {
          "url": "https://git.kernel.org/stable/c/33c77254e6e91f37c72c7fad4051777452b10de8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ebfd35c64433821bd5619a6d07ccc2df8b5b1de3"
        }
      ],
      "title": "scsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89856",
    "datePublished": "2026-09-16T10:31:29.517Z",
    "dateReserved": "2026-09-11T19:38:34.771Z",
    "dateUpdated": "2026-09-16T14:39:20.700Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "microsoft_vex": {
      "current_release_date": "2026-09-17T01:14:17.000Z",
      "cve": "CVE-2026-89856",
      "id": "msrc_CVE-2026-89856",
      "initial_release_date": "2026-09-17T01:14:17.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "scsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89856.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89856\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-16T11:16:53.440\",\"lastModified\":\"2026-09-16T15:18:13.507\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation\\n\\nha-\u003emsix_count is u16, but ha-\u003emax_req_queues, ha-\u003emax_rsp_queues and\\nha-\u003emax_qpairs are u8. Deriving the queue count as\\n\\\"ha-\u003emax_req_queues = ha-\u003emsix_count - 1\\\" therefore truncates: a board\\n(or a misconfigured/malicious hot-plugged device) advertising 257 MSI-X\\nvectors yields msix_count - 1 == 256, which truncates to 0. An MSI-X\\ncount of 1 zeroes it as well, and in target mode the subsequent\\n\\\"ha-\u003emax_req_queues--\\\" then underflows 0 to 255.\\n\\nWhen the count is 0, qla2x00_alloc_queues() calls\\nkzalloc_objs(struct req_que *, 0), which returns ZERO_SIZE_PTR. That is\\nnot NULL, so the allocation check passes and the following\\n\\\"ha-\u003ereq_q_map[0] = req\\\" dereferences ZERO_SIZE_PTR, corrupting memory\\nor crashing the kernel.\\n\\nAdd qla_calc_queue_count() to clamp the derived value into\\n[1, QLA_MAX_QUEUES - 1] so it always fits in u8 and is never zero, and\\nuse it at all three derivation sites (qla25xx_iospace_config(),\\nqla83xx_iospace_config() and qla24xx_enable_msix()). Also guard the\\ntarget-mode decrement so it cannot reintroduce a zero (which would in\\nturn underflow max_qpairs).\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/scsi/qla2xxx/qla_inline.h\",\"drivers/scsi/qla2xxx/qla_isr.c\",\"drivers/scsi/qla2xxx/qla_os.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"cf623d32761b00f221a9cfded3303d56e84b429d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"9eeddbeaa896f39d943644b16d83a6ad0ceab255\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"802068b9b683b8008fcccbf6e9ad133e597ec87c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"e80adfeac61b4d5db7ffe0f5af43999c33a4145e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"2efe50b2da829909023de4a2eb87badb7cfa53cc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"7a448f5ed0b283dbde4e9183dd1e98c221432dab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"33c77254e6e91f37c72c7fad4051777452b10de8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d74595278f4ab192af66d9e60a9087464638beee\",\"lessThan\":\"ebfd35c64433821bd5619a6d07ccc2df8b5b1de3\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/scsi/qla2xxx/qla_inline.h\",\"drivers/scsi/qla2xxx/qla_isr.c\",\"drivers/scsi/qla2xxx/qla_os.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.51\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.5\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2efe50b2da829909023de4a2eb87badb7cfa53cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/33c77254e6e91f37c72c7fad4051777452b10de8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7a448f5ed0b283dbde4e9183dd1e98c221432dab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/802068b9b683b8008fcccbf6e9ad133e597ec87c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9eeddbeaa896f39d943644b16d83a6ad0ceab255\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf623d32761b00f221a9cfded3303d56e84b429d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e80adfeac61b4d5db7ffe0f5af43999c33a4145e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ebfd35c64433821bd5619a6d07ccc2df8b5b1de3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-89856

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 15:18

Severity

8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/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/2efe50b2da829909023de4a2eb87badb7cfa53cc
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/33c77254e6e91f37c72c7fad4051777452b10de8
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7a448f5ed0b283dbde4e9183dd1e98c221432dab
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/802068b9b683b8008fcccbf6e9ad133e597ec87c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9eeddbeaa896f39d943644b16d83a6ad0ceab255
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cf623d32761b00f221a9cfded3303d56e84b429d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e80adfeac61b4d5db7ffe0f5af43999c33a4145e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ebfd35c64433821bd5619a6d07ccc2df8b5b1de3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_inline.h",
            "drivers/scsi/qla2xxx/qla_isr.c",
            "drivers/scsi/qla2xxx/qla_os.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cf623d32761b00f221a9cfded3303d56e84b429d",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "9eeddbeaa896f39d943644b16d83a6ad0ceab255",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "802068b9b683b8008fcccbf6e9ad133e597ec87c",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "e80adfeac61b4d5db7ffe0f5af43999c33a4145e",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "2efe50b2da829909023de4a2eb87badb7cfa53cc",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "7a448f5ed0b283dbde4e9183dd1e98c221432dab",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "33c77254e6e91f37c72c7fad4051777452b10de8",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            },
            {
              "lessThan": "ebfd35c64433821bd5619a6d07ccc2df8b5b1de3",
              "status": "affected",
              "version": "d74595278f4ab192af66d9e60a9087464638beee",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_inline.h",
            "drivers/scsi/qla2xxx/qla_isr.c",
            "drivers/scsi/qla2xxx/qla_os.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "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-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: Clamp MSI-X derived queue counts to avoid truncation\n\nha-\u003emsix_count is u16, but ha-\u003emax_req_queues, ha-\u003emax_rsp_queues and\nha-\u003emax_qpairs are u8. Deriving the queue count as\n\"ha-\u003emax_req_queues = ha-\u003emsix_count - 1\" therefore truncates: a board\n(or a misconfigured/malicious hot-plugged device) advertising 257 MSI-X\nvectors yields msix_count - 1 == 256, which truncates to 0. An MSI-X\ncount of 1 zeroes it as well, and in target mode the subsequent\n\"ha-\u003emax_req_queues--\" then underflows 0 to 255.\n\nWhen the count is 0, qla2x00_alloc_queues() calls\nkzalloc_objs(struct req_que *, 0), which returns ZERO_SIZE_PTR. That is\nnot NULL, so the allocation check passes and the following\n\"ha-\u003ereq_q_map[0] = req\" dereferences ZERO_SIZE_PTR, corrupting memory\nor crashing the kernel.\n\nAdd qla_calc_queue_count() to clamp the derived value into\n[1, QLA_MAX_QUEUES - 1] so it always fits in u8 and is never zero, and\nuse it at all three derivation sites (qla25xx_iospace_config(),\nqla83xx_iospace_config() and qla24xx_enable_msix()). Also guard the\ntarget-mode decrement so it cannot reintroduce a zero (which would in\nturn underflow max_qpairs)."
    }
  ],
  "id": "CVE-2026-89856",
  "lastModified": "2026-09-16T15:18:13.507",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-16T11:16:53.440",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2efe50b2da829909023de4a2eb87badb7cfa53cc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/33c77254e6e91f37c72c7fad4051777452b10de8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7a448f5ed0b283dbde4e9183dd1e98c221432dab"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/802068b9b683b8008fcccbf6e9ad133e597ec87c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9eeddbeaa896f39d943644b16d83a6ad0ceab255"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf623d32761b00f221a9cfded3303d56e84b429d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e80adfeac61b4d5db7ffe0f5af43999c33a4145e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebfd35c64433821bd5619a6d07ccc2df8b5b1de3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-M9FJ-XVR8-VH59

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 15:30

Details

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

scsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation

ha->msix_count is u16, but ha->max_req_queues, ha->max_rsp_queues and ha->max_qpairs are u8. Deriving the queue count as "ha->max_req_queues = ha->msix_count - 1" therefore truncates: a board (or a misconfigured/malicious hot-plugged device) advertising 257 MSI-X vectors yields msix_count - 1 == 256, which truncates to 0. An MSI-X count of 1 zeroes it as well, and in target mode the subsequent "ha->max_req_queues--" then underflows 0 to 255.

When the count is 0, qla2x00_alloc_queues() calls kzalloc_objs(struct req_que *, 0), which returns ZERO_SIZE_PTR. That is not NULL, so the allocation check passes and the following "ha->req_q_map[0] = req" dereferences ZERO_SIZE_PTR, corrupting memory or crashing the kernel.

Add qla_calc_queue_count() to clamp the derived value into [1, QLA_MAX_QUEUES - 1] so it always fits in u8 and is never zero, and use it at all three derivation sites (qla25xx_iospace_config(), qla83xx_iospace_config() and qla24xx_enable_msix()). Also guard the target-mode decrement so it cannot reintroduce a zero (which would in turn underflow max_qpairs).

Severity

8.4 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-89856"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:16:53Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation\n\nha-\u003emsix_count is u16, but ha-\u003emax_req_queues, ha-\u003emax_rsp_queues and\nha-\u003emax_qpairs are u8. Deriving the queue count as\n\"ha-\u003emax_req_queues = ha-\u003emsix_count - 1\" therefore truncates: a board\n(or a misconfigured/malicious hot-plugged device) advertising 257 MSI-X\nvectors yields msix_count - 1 == 256, which truncates to 0. An MSI-X\ncount of 1 zeroes it as well, and in target mode the subsequent\n\"ha-\u003emax_req_queues--\" then underflows 0 to 255.\n\nWhen the count is 0, qla2x00_alloc_queues() calls\nkzalloc_objs(struct req_que *, 0), which returns ZERO_SIZE_PTR. That is\nnot NULL, so the allocation check passes and the following\n\"ha-\u003ereq_q_map[0] = req\" dereferences ZERO_SIZE_PTR, corrupting memory\nor crashing the kernel.\n\nAdd qla_calc_queue_count() to clamp the derived value into\n[1, QLA_MAX_QUEUES - 1] so it always fits in u8 and is never zero, and\nuse it at all three derivation sites (qla25xx_iospace_config(),\nqla83xx_iospace_config() and qla24xx_enable_msix()). Also guard the\ntarget-mode decrement so it cannot reintroduce a zero (which would in\nturn underflow max_qpairs).",
  "id": "GHSA-m9fj-xvr8-vh59",
  "modified": "2026-09-16T15:30:59Z",
  "published": "2026-09-16T12:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89856"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2efe50b2da829909023de4a2eb87badb7cfa53cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33c77254e6e91f37c72c7fad4051777452b10de8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a448f5ed0b283dbde4e9183dd1e98c221432dab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/802068b9b683b8008fcccbf6e9ad133e597ec87c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9eeddbeaa896f39d943644b16d83a6ad0ceab255"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf623d32761b00f221a9cfded3303d56e84b429d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e80adfeac61b4d5db7ffe0f5af43999c33a4145e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebfd35c64433821bd5619a6d07ccc2df8b5b1de3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-89856

Vulnerability from csaf_microsoft - Published: 2026-09-17 01:14 - Updated: 2026-09-17 01:14

Summary

scsi: qla2xxx: Clamp MSI-X derived queue counts to avoid truncation

Scope

1 vulnerability in this advisory, including CVE-2026-89856.

CVE-2026-89856

8.4 (High)


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

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.

Detection rules are retrieved from Rulezet.

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-2026-89856 (GCVE-0-2026-89856)

FKIE_CVE-2026-89856

GHSA-M9FJ-XVR8-VH59

MSRC_CVE-2026-89856

Tags

Sightings

Nomenclature

Related by attack behaviour