CVE-2026-80921

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733
https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6
https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b
https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d
https://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf
https://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75d
https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f
https://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b
https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-09 17:17

Updated : 2026-09-10 06:17

NVD link : CVE-2026-80921

Mitre link : CVE-2026-80921

CVE.ORG link : CVE-2026-80921

JSON object : View

Products Affected

No product.

CWE

No CWE.

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"lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.49", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.13", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2.3", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/s390/kvm/vsie.c"], "defaultStatus": "affected"}]}], "published": "2026-09-09T17:17:47.240", "references": [{"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": 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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."}], "lastModified": "2026-09-10T06:17:06.037", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}