VDB
CVE-2026-80921
CVE-2026-80921
PUBLISHED
CVSS 8.8 HIGH
Reported by Linux · Published September 9, 2026
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.
EPSS 0.13% · 2.6th percentile
Risk Scores
CVSS 3.1
8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score
0.13%
2.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 6b79de4b056e5a2febc0c61233d8f0ad7868e49c, 6b79de4b056e5a2febc0c61233d8f0ad7868e49c, 6b79de4b056e5a2febc0c61233d8f0ad7868e49c |
| Linux | Linux | 4.20, 0, 5.10.269 |
| linux | linux_kernel | 4.20, 4.20, 4.20 |
| Linux | Linux | 6b79de4b056e5a2febc0c61233d8f0ad7868e49c, 6b79de4b056e5a2febc0c61233d8f0ad7868e49c, 6b79de4b056e5a2febc0c61233d8f0ad7868e49c |
Timeline
- Sep 9, 2026 Coalition ESS Score
- Sep 9, 2026 CVE Published
- Sep 10, 2026 EPSS Score
- Sep 10, 2026 CVE Updated