High severity8.8NVD Advisory· Published Sep 9, 2026· Updated Oct 19, 2026
CVE-2026-80921
CVE-2026-80921
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
80- osv-coords78 versionspkg:linux/kernelpkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-docpkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/bpftoolpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/rtlapkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/perfpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/libperfpkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/rv
>= 4.20.0, < 5.10.269+ 77 more
- (no CPE)range: >= 4.20.0, < 5.10.269
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 7.2.5-1.1
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
- (no CPE)range: < 6.12.0-211.63.1.el10_2
Patches
Vulnerability mechanics
References
9- git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733nvd
- git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6nvd
- git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66bnvd
- git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0dnvd
- git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdfnvd
- git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75dnvd
- git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2fnvd
- git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45bnvd
- git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131fnvd
News mentions
2- Linux Kernel: Twelve Vulnerabilities Disclosed Together on September 9, 2026Vypr Intelligence · Sep 9, 2026
- Android SDK: Nine Linux Kernel Flaws Disclosed Together on September 9, 2026Vypr Intelligence · Sep 9, 2026