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KVM: s390: vsie: zero stale crypto bits

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-80921

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80921

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "d110b3297f11ef227098b8a82ade2d5f123b7d2f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "59d51550b5cb916bda037673a721a404b3b47a0d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "f6079dca67eccb5eabef9f72437948c66dc5131f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "087c19cc60a8caa1a08e1e434c8be2caf6c27733",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "7d23489f51109e3ebba5b5db8c5f0185af7b7fdf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "935eeba276012916c76243e5cbb843efd8fdb75d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "d4bcd2df6d0d2af916b4fe1a533958778ea7c45b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6b79de4b056e5a2febc0c61233d8f0ad7868e49c",
        "lessThan": "34d5b5b646c91cfb9338d7a12c955a70ffb8c66b",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "arch/s390/kvm/vsie.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.20"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.269",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.220",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.187",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.156",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.108",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.49",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.13",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.3",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "arch/s390/kvm/vsie.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80921

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34882 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-80921 · Revision 1Source updated