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Permalink CVE-2026-63940
9.3 CRITICAL
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Local (L)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Changed (C)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Local (L)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Changed (C)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
created 6 days, 5 hours ago Activity log
  • Created & dismissed (max. allowed matches exceeded) suggestion 6 days, 5 hours ago
KVM: SEV: Ignore Port I/O requests of length '0'

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 products

Linux
  • ==5.11
  • =<6.18.*
  • <c30cde934c7813b4e3069765dac64ce3d31e34f2
  • <3b6035bc6bff20e89752ce4358bc4c9a9d5883f2
  • <3988bd2723de407ae90fa7a6f6029b4e60238c58
  • =<6.12.*
  • =<7.0.*
  • <2254972d4d69e279ba4e87bf0968eb08ad0d3c92
  • =<*
  • <5.11