PT-2026-61421 · Linux · Linux

CVE-2026-64104 · Published 2026-07-19 · Updated 2026-07-19

Mitre

CVSS v3.1

8.7

High

Base vector

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

In the Linux kernel, the following vulnerability has been resolved:

virt: sev-guest: Explicitly leak pages in unknown state

When set memory {encrypted,decrypted}() fail, the user cannot know at which point the function failed, meaning that the pages are left in an unknown state from the point of view of the caller.

Since the pages may be left in an unencrypted state, they are not suitable for general use, and cannot be returned safely to the buddy allocator. Avoid the issue by never freeing the pages, and then do the proper accounting by calling snp leak pages().

Fix

Related Identifiers

CVE-2026-64104

Affected Products

Linux

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-64104 · Security Note
• https://git.kernel.org/stable/c/fd948c3f96b18ff9ba7d3e8eae13d196593e1aaf · Note
• https://git.kernel.org/stable/c/bee400ad4f4259c9c0758e4f1960a1eed6f6f9f0 · Note
• https://git.kernel.org/stable/c/3d0cd0065deeb054b4b29236432e851806b7cc81 · Note