CVE-2023-53996
Critical
Description
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.
SeverityCritical
CVSS9.3
Exploit probability—
Product
Linux
PublishedDec 24, 2025
First seenDec 24, 2025
How to fix
Update
- Linux Linuxba50e7773a99a109a1ea6f753b766a080d3b21cc, 6615212d8e131b45bd9705b0d69cc0d2f624666f, 8ae7457e71a320867d868f2622d7c643596e4f43, ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 064ce6c550a0630789978bfec7a13ab2bd1bdcdf ≤ v < ba50e7773a99a109a1ea6f753b766a080d3b21cc, 064ce6c550a0630789978bfec7a13ab2bd1bdcdf ≤ v < 6615212d8e131b45bd9705b0d69cc0d2f624666f, 064ce6c550a0630789978bfec7a13ab2bd1bdcdf ≤ v < 8ae7457e71a320867d868f2622d7c643596e4f43, 064ce6c550a0630789978bfec7a13ab2bd1bdcdf ≤ v < ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2, 5.16 | ba50e7773a99a109a1ea6f753b766a080d3b21cc, 6615212d8e131b45bd9705b0d69cc0d2f624666f, 8ae7457e71a320867d868f2622d7c643596e4f43, ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2 |
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