CVEvulnerability

CVE-2026-63938

9.3 CRITICAL Published 2026-07-19 Modified 2026-10-27 Official page ↗
Status
Analyzed
Published
2026-07-19
Last modified
2026-10-27
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
9.3 CRITICAL — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Check PSC request indices against the actual size of the buffer When processing Page State Change (PSC) requests, validate the PSC buffer against the effective size of the scratch area, which could be less than the maximum size if the guest provided a pointer that isn't exactly at the start of the GHCB shared buffer.

Affected configurations

• linux linux kernel (>= 6.11 < 6.12.93) • linux linux kernel (>= 6.13 < 6.18.35) • linux linux kernel (>= 6.19 < 7.0.12) • linux linux kernel 7.1

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References