High severity · published Jan 10, 2023
CVE-2021-26409
Insufficient bounds checking in SEV-ES may allow an attacker to corrupt Reverse Map table (RMP) memory, potentially resulting in a loss of SNP (Secure Nested Paging) memory…
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
Insufficient bounds checking in SEV-ES may allow an attacker to corrupt Reverse Map table (RMP) memory, potentially resulting in a loss of SNP (Secure Nested Paging) memory integrity.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
3G
3rd Gen EPYC · AMD
various · source: vendor
MF
Milanpi Firmware · Amd
before 1.0.0.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26409
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26409
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032
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