In the Linux kernel, the following vulnerability has been resolved:
x86/sev: Make enc_dec_hypercall() accept a size instead of npages
enc_dec_hypercall() accepted a page count instead of a size, which forced its callers to round up. As a result, non-page aligned vaddrs caused pages to be spuriously marked as decrypted via the encryption status hypercall, which in turn caused consistent corruption of pages during live migration. Live migration requires accurate encryption status information to avoid migrating pages from the wrong perspective.
CVSS Details
- CVSS 3.1 Base Score: 9.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-libbpf-staticUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-libbpfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade python3-perf-debuginfoUpgrade perfUpgrade python3-perfUpgrade bpftoolUpgrade kernel-libbpf-develUpgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade kernelUpgrade kernel-livepatch-6.1.55-75.123 | Feb 20, 2026 | Dec 24, 2025 |
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linux-gcp-fipsUpgrade linux-gcp-5.4Upgrade linux-gcp-5.15Upgrade linux-gcp | Jan 6, 2026 | Dec 24, 2025 |
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