CVE-2021-26396

MediumCVSS 4.4/10Last modified Jun 17, 2026

Description

Insufficient validation of address mapping to IO in ASP (AMD Secure Processor) may result in a loss of memory integrity in the SNP guest.

Metrics

CVSS 3.1 4.4/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Weakness enumeration

CWE-345

Affected software

No affected versions have been published.

Timeline

Published
Jan 11, 2023
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-263977.1Insufficient address validation, may allow an attacker with a compromised ABL and UApp to corrupt sensitive memory locations potentially resCVE-2021-263987.8Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (ACVE-2021-264004.0AMD processors may speculatively re-order load instructions which can result in stale data being observed when multiple processors are operaCVE-2021-264015.6LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.CVE-2021-264027.1Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write parCVE-2021-264036.5Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confideCVE-2021-264045.5Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.CVE-2021-264067.5Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES CVE-2021-264075.5A randomly generated Initialization Vector (IV) may lead to a collision of IVs with the same key potentially resulting in information discloCVE-2021-264087.1Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in lCVE-2021-264097.8Insufficient bounds checking in SEV-ES may allow an attacker to corrupt Reverse Map table (RMP) memory, potentially resulting in a loss of SCVE-2021-264101.8Improper syscall input validation in ASP (AMD Secure Processor) may force the kernel into reading syscall parameter values from its own memo
CVE-2021-26396: Medium severity, CVSS 4.4 | Vulnix