Out-of-bounds write in AMD products - CVE-2021-26312
Published: May 26, 2022 / Updated: May 26, 2022
Vulnerability identifier: #VU63690
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-26312
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: AMD
Affected software:
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error caused by failure to flush the Translation Lookaside Buffer (TLB) of the I/O memory management unit (IOMMU). A local user can force an IO device to write to memory it should not be able to access and execute arbitrary code with elevated privileges.
How to mitigate CVE-2021-26312
Install updates from vendor's website.