FKIE_CVE-2026-80921
Vulnerability from fkie_nvd - Published: 2026-09-09 17:17 - Updated: 2026-09-10 06:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: vsie: zero stale crypto bits
When shadowing crypto access bits from a format0 apcb (crycb 0 or 1),
the bits 64..255 are unchanged from whatever is in the vsie page in the
crycb and thus in the apcb. This gives a nested guest potential access
to a device no longer available. Zero out the remaining bits.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/s390/kvm/vsie.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d110b3297f11ef227098b8a82ade2d5f123b7d2f",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "59d51550b5cb916bda037673a721a404b3b47a0d",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "f6079dca67eccb5eabef9f72437948c66dc5131f",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "087c19cc60a8caa1a08e1e434c8be2caf6c27733",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "7d23489f51109e3ebba5b5db8c5f0185af7b7fdf",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "935eeba276012916c76243e5cbb843efd8fdb75d",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "d4bcd2df6d0d2af916b4fe1a533958778ea7c45b",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
},
{
"lessThan": "34d5b5b646c91cfb9338d7a12c955a70ffb8c66b",
"status": "affected",
"version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/s390/kvm/vsie.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"lessThan": "4.20",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.269",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.220",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.187",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.49",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.3",
"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\nKVM: s390: vsie: zero stale crypto bits\n\nWhen shadowing crypto access bits from a format0 apcb (crycb 0 or 1),\nthe bits 64..255 are unchanged from whatever is in the vsie page in the\ncrycb and thus in the apcb. This gives a nested guest potential access\nto a device no longer available. Zero out the remaining bits."
}
],
"id": "CVE-2026-80921",
"lastModified": "2026-09-10T06:17:06.037",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.0,
"impactScore": 6.0,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-09-09T17:17:47.240",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f"
}
],
"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.
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.
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