CVEvulnerability
CVE-2026-80921
8.8 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-09-09
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Description
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
- https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733 git.kernel.org
- https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6 git.kernel.org
- https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b git.kernel.org
- https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d git.kernel.org
- https://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf git.kernel.org
- https://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75d git.kernel.org
- https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f git.kernel.org
- https://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b git.kernel.org
- https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f git.kernel.org