CVE-2026-64104
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().
Affected versions
Linux kernel versions
6.13.8,
6.14
and later are affected. Fixed in
6.18.34,
7.0.11,
7.1
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-64104?
CVE-2026-64104 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.13.8 onward and has been patched in 6.18.34, 7.0.11 and 7.1. CVE-2026-64104 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64104?
Yes — CVE-2026-64104 has been patched. Fixed versions include 6.18.34, 7.0.11 and 7.1. If you are running Linux kernel 6.13.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64104 actively exploited?
No — CVE-2026-64104 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.