CVEvulnerability

CVE-2026-63940

9.3 CRITICAL Published 2026-07-19 Modified 2026-10-28 Official page ↗
Status
Analyzed
Published
2026-07-19
Last modified
2026-10-28
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-190, CWE-191

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Ignore Port I/O requests of length '0' Explicitly ignore Port I/O requests of length '0' (or count '0'), so that setting up the software scratch area (and other code) doesn't have to worry about underflowing the length, and to allow for WARNing on trying to configure the scratch area with len==0.

Affected configurations

• linux linux kernel (>= 5.11 < 6.6.160) • linux linux kernel (>= 6.7 < 6.12.95) • linux linux kernel (>= 6.13 < 6.18.35) • linux linux kernel (>= 6.19 < 7.0.12) • linux linux kernel 7.1

Related

Weakness · CWE (2)

  • CWE-190 Integer Overflow or Wraparound weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References