scsi: qla2xxx: Avoid double completion in async IOCB timeout

{
  "id": "1d1a45bd6d6219c3b6a420837ac478281552f26791c0e632174db989b46003fd",
  "url": "https://osv.dev/vulnerability/CVE-2026-89847",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: qla2xxx: Avoid double completion in async IOCB timeout",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid double completion in async IOCB timeout qla2x00_async_iocb_timeout() tries to abort a timed-out async IOCB. When qla24xx_async_abort_cmd() fails, both the SRB_LOGIN_CMD path and the SRB_CTRL_VP/default path scan outstanding_cmds[] for the SRB and then call sp->done(sp, QLA_FUNCTION_TIMEOUT) unconditionally, without checking whether the SRB was actually found and removed. If the response ISR completes the same handle first, it removes the SRB under qp_lock_ptr and runs sp->done() -> complete(sp->comp). The submitter qla24xx_control_vp() wakes from wait_for_completion(), clears sp->comp, drops its reference and returns, reclaiming the on-stack completion. The timer reference keeps the SRB alive across the timeout handler, but not the submitter's stack. The timeout then issues a second sp->done() -> qla_ctrlvp_sp_done(), which evaluates \"if (sp->comp) complete(sp->comp)\"; with the pointer loaded before the submitter's NULL store, complete() writes into the freed stack frame, a use-after-free. Track whether this path removed the SRB from outstanding_cmds and only call sp->done() when it did, so the command is completed exactly once by whichever path owns it. This mirrors the sp_found guard already used in qla24xx_abort_iocb_timeout().",
    "evidence": "osv:CVE-2026-89847",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.270",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.221",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.188",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-89847",
      "aliases": [
        "CVE-2026-89847"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "71a7b6e3c7f121439f51a058e53d4a8e05b63dec"
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                {
                  "fixed": "7257b5e1fb6c9387714f66e01b79ec82b717eede"
                },
                {
                  "fixed": "f5b660e0b0d9190d8853c795c2522cc5f8c93003"
                },
                {
                  "fixed": "6e217a9482eabbd8b29847be334c74cf468d3544"
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                {
                  "fixed": "d6d856c722f40f0694ff755208552e658db6dd42"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89847.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.19.0"
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                {
                  "fixed": "5.10.270"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89847.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.471586991Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544",
        "https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec",
        "https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede",
        "https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07",
        "https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714",
        "https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8",
        "https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42",
        "https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89847.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89847",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89847.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89847",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493103,
  "published_at": "2026-09-16T10:31:21.286+00:00"
}