CVE-2022-23825

Protected-memory disclosure via branch-predictor aliasing

Published Jul 14, 2022 · Updated Sep 16, 2024

Branch type confusion in affected AMD processors allows local users to infer protected memory through branch-predictor aliasing. The branch predictor treats aliasing instructions as the wrong branch type and speculatively executes at an incorrect target before the pipeline is flushed. Exploitation requires local code execution and can expose kernel data to user space or hypervisor data to a guest, while address-space isolation limits cross-process and cross-VM leakage.

CVSS severity6.5
Medium
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Branch type confusion in affected AMD processors allows local users to infer protected memory through branch-predictor aliasing. The branch predictor treats aliasing instructions as the wrong branch type and speculatively executes at an incorrect target before the pipeline is flushed. Exploitation requires local code execution and can expose kernel data to user space or hypervisor data to a guest, while address-space isolation limits cross-process and cross-VM leakage.

The record

CVE
CVE-2022-23825
Published
Jul 14, 2022
Updated
Sep 16, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-668, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.6Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.5Oracle LinuxCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

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 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

CWE-668Exposure of Resource to Wrong Sphere
T1005Data from Local System

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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