CVE-2022-48727

Guest instruction re-execution via stale exception syndrome

Published Jun 20, 2024 · Updated Aug 5, 2026

Improper exception handling in Linux arm64 KVM allows attackers to cause incorrect guest instruction re-execution via a synchronized SError. The fixup_guest_exit() path trusts a stale vCPU ESR value after an IRQ synchronizes an SError and can decrement ELR_EL2 based on a preceding HVC. The condition requires that exception sequence; the published record establishes only duplicate execution inside the guest, not attacker control or host impact.

CVSS severityUnavailable
Unscored
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

Improper exception handling in Linux arm64 KVM allows attackers to cause incorrect guest instruction re-execution via a synchronized SError. The fixup_guest_exit() path trusts a stale vCPU ESR value after an IRQ synchronizes an SError and can decrement ELR_EL2 based on a preceding HVC. The condition requires that exception sequence; the published record establishes only duplicate execution inside the guest, not attacker control or host impact.

The record

CVE
CVE-2022-48727
Published
Jun 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.11
  2. Affected versionversion=defe21f49bc98b095300752aa1e19bb608f3e97d <1c71dbc8a179d99dd9bb7e7fc1888db613cf85de
  3. Affected versionversion=defe21f49bc98b095300752aa1e19bb608f3e97d <57e2986c3b25092691a6e3d6ee9168caf8978932
  4. Affected versionversion=defe21f49bc98b095300752aa1e19bb608f3e97d <e1e852746997500f1873f60b954da5f02cc2dba3

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=defe21f49bc98b095300752aa1e19bb608f3e97d <1c71dbc8a179d99dd9bb7e7fc1888db613cf85de; version=defe21f49bc98b095300752aa1e19bb608f3e97d <57e2986c3b25092691a6e3d6ee9168caf8978932; version=defe21f49bc98b095300752aa1e19bb608f3e97d <e1e852746997500f1873f60b954da5f02cc2dba3

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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