CVE•Published 2026-09-09•Modified 2026-09-10•1 article on news•4 live references•NVD data
CVE-2026-80921
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
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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.
Timeline
Published 2026-09-09
Modified 2026-09-10
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-80921Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-80921Censys host search filtered to this CVE id.
grep.app
CVE-2026-80921Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-80921GitHub code search for direct mentions.
Google dork
"CVE-2026-80921" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.