linux linux-kernel CVE-2026-80921 is a vulnerability in Linux Kernel
Published on September 9, 2026

KVM: s390: vsie: zero stale crypto bits
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.

NVD


Products Associated with CVE-2026-80921

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Affected Versions

Linux: Linux: