{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7"
            },
            {
              "fixed": "8c1ebcade6aac58137f2645b579894301febabf3"
            },
            {
              "fixed": "1d8bbc4344b9367d9d54731475d745fbc9ea28f2"
            },
            {
              "fixed": "2c3b17ee53f034936f7398dbf4d143e608b7c35c"
            },
            {
              "fixed": "ae09260be7454ed7630a913f147591a25e3a9d09"
            },
            {
              "fixed": "fcf0804dfe05862007189ac9dc4dc2063be36de1"
            },
            {
              "fixed": "8286a9095fb59751fba171afa2b4f590271c87d5"
            },
            {
              "fixed": "122bf170c94a3797531b12fee580639a5dc893ed"
            },
            {
              "fixed": "33d102102d925357c5fd172dd6672a27d74b3215"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.14.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89854.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix cs84xx use-after-free on host teardown\n\nqla84xx_put_chip() drops the last reference to ha-\u003ecs84xx and frees it via\n__qla84xx_chip_release() without clearing ha-\u003ecs84xx. During teardown it ran\nbefore scsi_remove_host(), which is what removes the 84xx_fw_version host\nsysfs attribute. A concurrent read of that attribute in the window between\nthe two calls executes qla24xx_84xx_fw_version_show(), which dereferences\nthe freed ha-\u003ecs84xx, resulting in a use-after-free.\n\nMove qla84xx_put_chip() to after scsi_remove_host() in both\nqla2x00_remove_one() and qla2x00_disable_board_on_pci_error(). Once\nscsi_remove_host() returns, the sysfs attribute is gone and kernfs has\ndrained any in-flight show(), so no reader can touch cs84xx; the put still\nruns before the host and ha are freed.",
  "id": "CVE-2026-89854",
  "modified": "2026-09-18T03:30:37.198461017Z",
  "published": "2026-09-16T10:31:27.906Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89854.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89854"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "scsi: qla2xxx: Fix cs84xx use-after-free on host teardown"
}