CVE-2021-26345

MediumCVSS 4.9/10Last modified Jun 17, 2026

Description

Failure to validate the value in APCB may allow a privileged attacker to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.

Metrics

CVSS 3.1 4.9/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
AMD	2nd Gen AMD EPYC™ Processors	various
AMD	3rd Gen AMD EPYC™ Processors	various
AMD	4th Gen AMD EPYC™ Processors	various
AMD	AMD EPYC™ Embedded 7002	various
AMD	AMD EPYC™ Embedded 7003	various
AMD	AMD EPYC™ Embedded 7002	various
AMD	AMD EPYC™ Embedded 7003	various

References

Timeline

Published: Nov 14, 2023
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-263465.5Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in t CVE-2021-263474.7Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in t CVE-2021-263485.5Failure to flush the Translation Lookaside Buffer (TLB) of the I/O memory management unit (IOMMU) may lead an IO device to write to memory i CVE-2021-263495.5Failure to assign a new report ID to an imported guest may potentially result in an SEV-SNP guest VM being tricked into trusting a dishonest CVE-2021-263504.7A TOCTOU race condition in SMU may allow for the caller to obtain and manipulate the address of a message port register which may result in CVE-2021-263515.5Insufficient DRAM address validation in System Management Unit (SMU) may result in a DMA (Direct Memory Access) read/write from/to invalid D CVE-2021-263525.5Insufficient bound checks in System Management Unit (SMU) PCIe Hot Plug table may result in access/updates from/to invalid address space tha CVE-2021-263537.8Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state CVE-2021-263545.5Insufficient bounds checking in ASP may allow an attacker to issue a system call from a compromised ABL which may cause arbitrary memory val CVE-2021-263555.5Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in CVE-2021-263567.4A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data c CVE-2021-263607.8An attacker with local access to the system can make unauthorized modifications of the security configuration of the SOC registers. This cou