CVE-2026-80921KVM: s390: vsie: zero stale crypto bits
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before d110b3297f11ef227098b8a82ade2d5f123b7d2f; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before 59d51550b5cb916bda037673a721a404b3b47a0d; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before f6079dca67eccb5eabef9f72437948c66dc5131f; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before 087c19cc60a8caa1a08e1e434c8be2caf6c27733; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before 7d23489f51109e3ebba5b5db8c5f0185af7b7fdf; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before 935eeba276012916c76243e5cbb843efd8fdb75d; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before d4bcd2df6d0d2af916b4fe1a533958778ea7c45b; from 6b79de4b056e5a2febc0c61233d8f0ad7868e49c before 29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6; and 1 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f
- https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d
- https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f
- https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733
- https://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf
- https://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75d
- https://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b
- https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6
- https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.