x86/sev: Make enc_dec_hypercall() accept a size instead of npages (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.11 % · percentile 1 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Deferred
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
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | Linux |
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2025-205158
- GCVE · GCVE-0-2023-53996
CERT-FR advisories
- CERTFR-2026-AVI-0369 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0247 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0225 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0170 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0108 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 064ce6c550a0630789978bfec7a13ab2bd1bdcdf < ba50e7773a99a109a1ea6f753b766a080d3b21cc ; affected 064ce6c550a0630789978bfec7a13ab2bd1bdcdf < 6615212d8e131b45bd9705b0d69cc0d2f624666f ; affected 064ce6c550a0630789978bfec7a13ab2bd1bdcdf < 8ae7457e71a320867d868f2622d7c643596e4f43 ; affected 064ce6c550a0630789978bfec7a13ab2bd1bdcdf < ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2 |
| Linux · Linux | affected 5.16 ; unaffected 0 < 5.16 ; unaffected 6.1.53 ≤ 6.1.* ; unaffected 6.4.16 ≤ 6.4.* ; unaffected 6.5.3 ≤ 6.5.* ; unaffected 6.6 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |