vulnerability
Ubuntu: (CVE-2023-53996): linux-gcp-fips vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:M/Au:M/C:N/I:C/A:C) | Dec 24, 2025 | Jan 6, 2026 | Feb 3, 2026 |
Severity
6
CVSS
(AV:L/AC:M/Au:M/C:N/I:C/A:C)
Published
Dec 24, 2025
Added
Jan 6, 2026
Modified
Feb 3, 2026
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.
Solutions
ubuntu-upgrade-linux-gcpubuntu-upgrade-linux-gcp-5-15ubuntu-upgrade-linux-gcp-5-4ubuntu-upgrade-linux-gcp-fips
References
- CVE-2023-53996
- https://attackerkb.com/topics/CVE-2023-53996
- URL-https://git.kernel.org/stable/c/6615212d8e131b45bd9705b0d69cc0d2f624666f
- URL-https://git.kernel.org/stable/c/8ae7457e71a320867d868f2622d7c643596e4f43
- URL-https://git.kernel.org/stable/c/ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2
- URL-https://git.kernel.org/stable/c/ba50e7773a99a109a1ea6f753b766a080d3b21cc
- URL-https://www.cve.org/CVERecord?id=CVE-2023-53996
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