GHSA-9V3F-QP8W-F486
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 15:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89854"
],
"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: 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": "GHSA-9v3f-qp8w-f486",
"modified": "2026-09-16T15:30:59Z",
"published": "2026-09-16T12:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89854"
},
{
"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"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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.
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.