{"id":"CVE-2026-80921","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-80921","summary":"KVM: s390: vsie: zero stale crypto bits","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: vsie: zero stale crypto bits\n\nWhen shadowing crypto access bits from a format0 apcb (crycb 0 or 1),\nthe bits 64..255 are unchanged from whatever is in the vsie page in the\ncrycb and thus in the apcb. This gives a nested guest potential access\nto a device no longer available. Zero out the remaining bits.","published":"2026-09-09T16:19:42.335Z","modified":"2026-09-11T03:49:00.245573950Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.269"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733"},{"type":"WEB","url":"https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80921.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80921"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-11T03:49:00.245573950Z"}}