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Debian LinuxOperating system · Debian

CVE-2022-23825

MEDIUM · 6.5 CVSS v3.1 Published 2022-07-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
67/100
Remediation priority · Elevated
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a hardware vulnerability in AMD processors where aliases in the branch predictor can cause the wrong branch type to be predicted. This speculative execution behavior may allow an attacker to potentially infer sensitive information through side-channel analysis, similar to other speculative execution vulnerabilities like Spectre.

MitigationApply AMD-provided microcode/firmware updates and BIOS updates for affected processors. Contact AMD for specific processor model guidance and monitor for OS-level security patches that may include workarounds.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Debian LinuxOperating system
Affected:= 11.0
FedoraOperating system
Affected:= 35= 36
EsxiOperating system
Affected:= 7.0
Athlon X4 750 FirmwareOperating system
Affected:all versions
Athlon X4 760k FirmwareOperating system
Affected:all versions
Athlon X4 830 FirmwareOperating system
Affected:all versions
Athlon X4 835 FirmwareOperating system
Affected:all versions
Athlon X4 840 FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the AMD processor model in your system
    Run 'lscpu' or 'cat /proc/cpuinfo' and look for the 'model name' field. For hardware inspection, check BIOS/UEFI settings or use tools like 'dmidecode -t processor'.
    Affected if The processor model matches AMD Athlon X4 750, X4 760k, X4 830, X4 835, or X4 840 (or other affected AMD families not explicitly listed in this CVE entry).
  2. Check the installed CPU microcode version
    On Linux, check /sys/devices/system/cpu/cpu0/microcode/version or use 'dmesg | grep microcode' after boot. On VMware ESXi, check via 'vmware -l' or ESXi host client for BIOS/microcode info.
    Affected if The microcode version is older than the version that addresses this CVE, or if no microcode update has been applied.
  3. Verify BIOS/firmware version on AMD Athlon X4 systems
    Access system BIOS/UEFI during boot or use tools like 'dmidecode -t bios' on Linux to check BIOS version and date. Contact system manufacturer for update availability.
    Affected if The BIOS/firmware is at the original factory version with no updates applied.
  4. Check OS-level vulnerability status for speculative execution flaws
    On Linux, run 'cat /proc/cpuinfo' and look for 'bugs' section, or use vulnerability assessment tools like 'spectre-meltdown-checker' (if available in your environment). On Debian, check with 'cat /var/log/dmesg | grep -i microcode'.
    Affected if The system shows no microcode loading in logs or vulnerability checkers indicate unmitigated speculative execution vulnerabilities.

Your system is affected if it uses an AMD Athlon X4 750/760k/830/835/840 processor or other affected AMD CPU and lacks the corresponding microcode/firmware update that addresses branch predictor aliasing.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply AMD-provided microcode/firmware updates and BIOS updates for affected processors. Contact AMD for specific processor model guidance and monitor for OS-level security patches that may include workarounds.

Fix this in Debian Linux Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-23825 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data