FKIE_CVE-2026-89854
Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 15:18
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/scsi/qla2xxx/qla_os.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "8c1ebcade6aac58137f2645b579894301febabf3",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "1d8bbc4344b9367d9d54731475d745fbc9ea28f2",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "2c3b17ee53f034936f7398dbf4d143e608b7c35c",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "ae09260be7454ed7630a913f147591a25e3a9d09",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "fcf0804dfe05862007189ac9dc4dc2063be36de1",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "8286a9095fb59751fba171afa2b4f590271c87d5",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "122bf170c94a3797531b12fee580639a5dc893ed",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
},
{
"lessThan": "33d102102d925357c5fd172dd6672a27d74b3215",
"status": "affected",
"version": "fe1b806f4f7172b1eae18ddeebb7d8fb351043f7",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/scsi/qla2xxx/qla_os.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.14"
},
{
"lessThan": "3.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"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-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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",
"lastModified": "2026-09-16T15:18:13.367",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-09-16T11:16:53.180",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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.
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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.
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