CVE-2023-20558
No known exploitation. EPSS puts it in the 50th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.7% chance of exploitation activity in the next 30 days, which ranks it in the 50th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
4 events over 700 days, from the signal feeds we watch.
- Patch availablerecord updated
- Publishedweakness classified
Affected products
- Ryzen™ 2000 Series Hardware Firmware
- Ryzen™ 3000 SeriesHardware Firmware
- Ryzen™ 4000 SeriesHardware Firmware
- Ryzen™ 5000 SeriesHardware Firmware
- 2nd Gen AMD Ryzen™ Threadripper™ ProcessorHardware Firmware
- 3rd Gen AMD Ryzen™ Threadripper™ ProcessorsHardware Firmware
- Ryzen™ Threadripper™ PRO ProcessorHardware Firmware
- ryzen 7 5700g firmwareHardware Firmware
And 88 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Scored 8.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
Sources
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