Riskcovery

CVE-2026-64104

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

State
Published
Severity
8.7 High
Published
Jul 19, 2026
Updated
Aug 5, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

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().

Scores

CVSSScoreVectorSource
3.18.7 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:LLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3e385c0d6ce88ac9916dcf84267bd5855d830748 to before bee400ad4f4259c9c0758e4f1960a1eed6f6f9f0Affected
  • 3e385c0d6ce88ac9916dcf84267bd5855d830748 to before 3d0cd0065deeb054b4b29236432e851806b7cc81Affected
  • 3e385c0d6ce88ac9916dcf84267bd5855d830748 to before fd948c3f96b18ff9ba7d3e8eae13d196593e1aafAffected
  • 0b16521f95c875e79d657cb8d6911c15080dbb80Affected
  • 6.13.8 to before 6.14Affected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.34 through 6.18.*Not affected
  • 7.0.11 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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