PT-2026-61255 · Linux · Linux

CVE-2026-63938 · Publicado 2026-07-19 · Atualizado 2026-07-19

Mitre

CVSS v3.1

9.3

Crítica

Vetor base

AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

Correção

Identificadores relacionados

CVE-2026-63938

Produtos afetados

Linux

Referências · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-63938 · Nota de Segurança
• https://git.kernel.org/stable/c/5198f70c09a5f6e9e5f5a0a2c6b388f24294b176 · Nota
• https://git.kernel.org/stable/c/75c8d1d7291268b479794fba5808971dc2f5eaf3 · Nota
• https://git.kernel.org/stable/c/505a3b94535583e4265360e2621734e355ef263d · Nota
• https://git.kernel.org/stable/c/121d88de56bc5c0ba0ce2f6381af67f948a7e7c1 · Nota