CVE-2023-52659

Guest crash via truncated page-frame address

Published May 17, 2024 · Updated May 11, 2026

Denial of service in Linux 6.5 through 6.6.22, 6.7 through 6.7.10 and 6.8 through 6.8.1 allows local users to crash SEV-SNP guests. The x86 pvalidate_pages path passes a 40-bit guest frame number to the pfn_to_kaddr macro, whose shift truncates valid address bits unless the input is first widened to 64 bits. The crash requires an x86-64 SEV-SNP guest processing a guest physical address above 1 TB; the documented consequence is limited to that guest.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 6.5 through 6.6.22, 6.7 through 6.7.10 and 6.8 through 6.8.1 allows local users to crash SEV-SNP guests. The x86 pvalidate_pages path passes a 40-bit guest frame number to the pfn_to_kaddr macro, whose shift truncates valid address bits unless the input is first widened to 64 bits. The crash requires an x86-64 SEV-SNP guest processing a guest physical address above 1 TB; the documented consequence is limited to that guest.

The record

CVE
CVE-2023-52659
Published
May 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.5
  2. Affected versionversion=6c3211796326a9d35618b866826ca556c8f008a8 <325956b0173f11e98f90462be4829a8b8b0682ce
  3. Affected versionversion=6c3211796326a9d35618b866826ca556c8f008a8 <7e1471888a5e6e846e9b4d306e5327db2b58e64e
  4. Affected versionversion=6c3211796326a9d35618b866826ca556c8f008a8 <814305b5c23cb815ada68d43019f39050472b25f
  5. Affected versionversion=6c3211796326a9d35618b866826ca556c8f008a8 <8e5647a723c49d73b9f108a8bb38e8c29d3948ea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=6c3211796326a9d35618b866826ca556c8f008a8 <325956b0173f11e98f90462be4829a8b8b0682ce; version=6c3211796326a9d35618b866826ca556c8f008a8 <7e1471888a5e6e846e9b4d306e5327db2b58e64e; version=6c3211796326a9d35618b866826ca556c8f008a8 <814305b5c23cb815ada68d43019f39050472b25f; version=6c3211796326a9d35618b866826ca556c8f008a8 <8e5647a723c49d73b9f108a8bb38e8c29d3948ea

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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