CVE-2026-64104 Details
Description
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().
A vulnerability in the Linux kernel's handling of pages in the SEV-guest virtualization environment can lead to an explicit leak of pages left in an unknown state. When the functions set_memory_encrypted() or set_memory_decrypted() fail, the caller cannot determine where the failure occurred, leaving the pages potentially unencrypted and unsuitable for general use. Consequently, these pages cannot be safely returned to the buddy allocator. The issue is addressed by modifying the page management to prevent freeing the pages in case of an error, and instead properly accounting for them by calling snp_leak_pages().
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/3d0cd0065deeb054b4b29236432e851806b7cc81 | kernel.org | Patch |
| https://git.kernel.org/stable/c/bee400ad4f4259c9c0758e4f1960a1eed6f6f9f0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fd948c3f96b18ff9ba7d3e8eae13d196593e1aaf | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-401 | Missing Release of Memory after Effective Lifetime | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.13.8, < 6.14 >= 6.14.1, < 6.18.34 >= 6.19, < 7.0.11 6.14 - 6.14 rc6 6.14 rc7 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 12, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |