CVE-2026-80921
KVM: s390: vsie: zero stale crypto bits
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 9, 2026 |
| Last Updated | Sep 10, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new high vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
6b79de4b056e5a2febc0c61233d8f0ad7868e49c < d110b3297f11ef227098b8a82ade2d5f123b7d2f 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < 59d51550b5cb916bda037673a721a404b3b47a0d 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < f6079dca67eccb5eabef9f72437948c66dc5131f 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < 087c19cc60a8caa1a08e1e434c8be2caf6c27733 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < 7d23489f51109e3ebba5b5db8c5f0185af7b7fdf 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < 935eeba276012916c76243e5cbb843efd8fdb75d 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < d4bcd2df6d0d2af916b4fe1a533958778ea7c45b 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < 29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6 6b79de4b056e5a2febc0c61233d8f0ad7868e49c < 34d5b5b646c91cfb9338d7a12c955a70ffb8c66b
Linux / Linux
4.20
References
git.kernel.org: https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f git.kernel.org: https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d git.kernel.org: https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f git.kernel.org: https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733 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/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b git.kernel.org: https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6 git.kernel.org: https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b