CVE-2021-26381
No known exploitation. EPSS puts it in the 4th 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
Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.
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
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 4th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
5 events over 0 days, from the signal feeds we watch.
- Patch availablepublished, weakness classified, att&ck mapped, record updated
Affected products
- AMD Radeon PRO V520Hardware Firmware
- AMD Radeon PRO V620Hardware Firmware
- AMD Ryzen Embedded V1000Hardware Firmware
- AMD Ryzen Embedded 5000Hardware Firmware
- AMD Ryzen Embedded R1000Hardware Firmware
- AMD Athlon 3000 Series Mobile processor with Radeon graphicsHardware Firmware
- AMD Ryzen 3000 Series Desktop ProcessorsHardware Firmware
- AMD Ryzen 3000 Series Mobile processor with Radeon graphicsHardware Firmware
- AMD Ryzen™ Threadripper™ PRO 3000 WX-Series ProcessorsHardware Firmware
- AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ GraphicsHardware Firmware
- AMD Ryzen™ Threadripper™ PRO 5000 WX-Series ProcessorsHardware Firmware
- AMD Athlon™ 3000 Series Mobile Processors with Radeon™ GraphicsHardware Firmware
- AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ GraphicsHardware Firmware
- AMD Ryzen™ 3000 Series Desktop ProcessorsHardware Firmware
- AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ GraphicsHardware Firmware
- AMD Ryzen™ 4000 Series Desktop ProcessorsHardware Firmware
And 29 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorAV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Scored 6.4 by bdu.
How it is reached
- Access Vector LocalRequires local access
- Access Complexity HighSpecialized conditions required
Impact if exploited
- Confidentiality H
- Integrity H
- Availability H
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
Watch the software you run.
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