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CVE-2026-80921

KVM: s390: vsie: zero stale crypto bits

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.269, 5.15.220, 6.1.187, 6.6.156, 6.12.108, and 3 more
None on Exploit-DB, Metasploit or GitHub

Summary

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

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in d110b3297f11ef227098b8a82ade2d5f123b7d2f; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in 59d51550b5cb916bda037673a721a404b3b47a0d; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in f6079dca67eccb5eabef9f72437948c66dc5131f; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in 087c19cc60a8caa1a08e1e434c8be2caf6c27733; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in 7d23489f51109e3ebba5b5db8c5f0185af7b7fdf; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in 935eeba276012916c76243e5cbb843efd8fdb75d; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in d4bcd2df6d0d2af916b4fe1a533958778ea7c45b; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in 29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6; From 6b79de4b056e5a2febc0c61233d8f0ad7868e49c · fixed in 34d5b5b646c91cfb9338d7a12c955a70ffb8c66b

  • Linux Linux

    4.20

  • KernelLinux

    From 4.20.0 · fixed in 5.10.269; From 5.11.0 · fixed in 5.15.220; From 5.16.0 · fixed in 6.1.187; From 6.2.0 · fixed in 6.6.156; From 6.7.0 · fixed in 6.12.108; From 6.13.0 · fixed in 6.18.49; From 6.19.0 · fixed in 7.1.13; From 7.2.0 · fixed in 7.2.3

References 9

git.kernel.org