CVE-2026-93242 (GCVE-0-2026-93242)
Vulnerability from cvelistv5
Published
2026-09-24 15:40
Modified
2026-10-19 09:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix response queue over-consumption in __qla_consume_iocb() qla24xx_process_response_queue() advances ring_ptr past the head IOCB before dispatching, so by the time __qla_consume_iocb() runs, ring_ptr already points at the first continuation IOCB. The function however looped purex->entry_count times starting at ring_ptr. As entry_count includes the head, this consumed one entry too many: it stamped RESPONSE_PROCESSED on the next, unrelated IOCB and advanced the ring past it, silently dropping a legitimate firmware response. The head IOCB's signature was also never marked. Mark the head processed and account for it, then consume only the entry_count - 1 continuation IOCBs, matching __qla_copy_purex_to_buffer().
References
Impacted products
Vendor Product Version
Linux Linux Version: fac2807946c10b9a509b9c348afd442fa823c5f7
Version: fac2807946c10b9a509b9c348afd442fa823c5f7
Version: fac2807946c10b9a509b9c348afd442fa823c5f7
Version: fac2807946c10b9a509b9c348afd442fa823c5f7
Version: fac2807946c10b9a509b9c348afd442fa823c5f7
Version: fac2807946c10b9a509b9c348afd442fa823c5f7
Version: fac2807946c10b9a509b9c348afd442fa823c5f7
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{
  "containers": {
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        {
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          "programFiles": [
            "drivers/scsi/qla2xxx/qla_isr.c"
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.15"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.15.221",
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              "lessThanOrEqual": "6.1.*",
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              "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": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
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                  "vulnerable": true
                },
                {
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix response queue over-consumption in __qla_consume_iocb()\n\nqla24xx_process_response_queue() advances ring_ptr past the head IOCB\nbefore dispatching, so by the time __qla_consume_iocb() runs, ring_ptr\nalready points at the first continuation IOCB. The function however\nlooped purex-\u003eentry_count times starting at ring_ptr. As entry_count\nincludes the head, this consumed one entry too many: it stamped\nRESPONSE_PROCESSED on the next, unrelated IOCB and advanced the ring\npast it, silently dropping a legitimate firmware response. The head\nIOCB\u0027s signature was also never marked.\n\nMark the head processed and account for it, then consume only the\nentry_count - 1 continuation IOCBs, matching __qla_copy_purex_to_buffer()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:07:53.904Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a136c311676fd1010b1bde3bcfd410caa2fa040f"
        },
        {
          "url": "https://git.kernel.org/stable/c/d841707fafba5f80341b82e8c3a4c24fc5aa5132"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e3f129538c32d0019437197735912308c161843"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd1534d4afab47f13dfc27fff6f59dd859a0ac3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/31715d1e1cbf3a37ce3452635c5602f73fd7abd4"
        },
        {
          "url": "https://git.kernel.org/stable/c/df86c27cf1ba9d66f737a1fa56479c6e7efafe4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ba019bdd89d931499d9476456b5d9c7ab7fa753"
        }
      ],
      "title": "scsi: qla2xxx: Fix response queue over-consumption in __qla_consume_iocb()",
      "x_generator": {
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      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93242",
    "datePublished": "2026-09-24T15:40:26.570Z",
    "dateReserved": "2026-09-17T16:02:15.095Z",
    "dateUpdated": "2026-10-19T09:07:53.904Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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