virt: sev-guest: Explicitly leak pages in unknown state
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().
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.18.34, 7.0.11
- CVEs
- CVE-2026-64104
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 17:50 UTC · Revision 1
Source evidence
virt: sev-guest: Explicitly leak pages in unknown state
core-osv · Original sourcePublished 19 Jul 2026, 15:40 UTC
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().
osv:CVE-2026-64104
Kernel
Fixed versions: 6.18.34, 7.0.11
Complete source record
{
"id": "0f13d284a213714b151ecc0c696663d9ebc2a04554c2de167d7dde2054bf13ae",
"url": "https://osv.dev/vulnerability/CVE-2026-64104",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "virt: sev-guest: Explicitly leak pages in unknown state",
"summary": "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().",
"evidence": "osv:CVE-2026-64104",
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"evidence": "/affected/1/ranges"
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"severity": "high",
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"id": "CVE-2026-64104",
"aliases": [
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"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L"
}
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"affected": [
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"modified": "2026-10-28T02:30:38.222772370Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/3d0cd0065deeb054b4b29236432e851806b7cc81",
"https://git.kernel.org/stable/c/bee400ad4f4259c9c0758e4f1960a1eed6f6f9f0",
"https://git.kernel.org/stable/c/fd948c3f96b18ff9ba7d3e8eae13d196593e1aaf",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64104.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-64104",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"provider_metadata": {
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"evidence": "/id"
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"source_id": "core-osv",
"document_id": 505492,
"published_at": "2026-07-19T15:40:07.994+00:00"
}