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scsi: qla2xxx: Fix cs84xx use-after-free on host teardown

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix cs84xx use-after-free on host teardown qla84xx_put_chip() drops the last reference to ha->cs84xx and frees it via __qla84xx_chip_release() without clearing ha->cs84xx. During teardown it ran before scsi_remove_host(), which is what removes the 84xx_fw_version host sysfs attribute. A concurrent read of that attribute in the window between the two calls executes qla24xx_84xx_fw_version_show(), which dereferences the freed ha->cs84xx, resulting in a use-after-free. Move qla84xx_put_chip() to after scsi_remove_host() in both qla2x00_remove_one() and qla2x00_disable_board_on_pci_error(). Once scsi_remove_host() returns, the sysfs attribute is gone and kernfs has drained any in-flight show(), so no reader can touch cs84xx; the put still runs before the host and ha are freed.

Announced Group revision 1
Original source ↗

CVE-2026-89854

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89854

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "8c1ebcade6aac58137f2645b579894301febabf3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "1d8bbc4344b9367d9d54731475d745fbc9ea28f2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "2c3b17ee53f034936f7398dbf4d143e608b7c35c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "ae09260be7454ed7630a913f147591a25e3a9d09",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "fcf0804dfe05862007189ac9dc4dc2063be36de1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "8286a9095fb59751fba171afa2b4f590271c87d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "122bf170c94a3797531b12fee580639a5dc893ed",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
        "lessThan": "33d102102d925357c5fd172dd6672a27d74b3215",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_os.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_os.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89854

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36305 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-89854 · Revision 1Source updated