Vulnerability 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.
References
- https://git.kernel.org/stable/c/6615212d8e131b45bd9705b0d69cc0d2f624666f
- https://git.kernel.org/stable/c/8ae7457e71a320867d868f2622d7c643596e4f43
- https://git.kernel.org/stable/c/ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2
- https://git.kernel.org/stable/c/ba50e7773a99a109a1ea6f753b766a080d3b21cc
FAQ
What is CVE-2023-53996?
CVE-2023-53996 is a documented vulnerability. 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, whi...
How severe is CVE-2023-53996?
CVSS scoring is not yet available for CVE-2023-53996. Check NVD for updates.
Is there a patch for CVE-2023-53996?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.