CVE Vulnerabilities

CVE-2021-26356

Time-of-check Time-of-use (TOCTOU) Race Condition

Published: May 09, 2023 | Modified: May 16, 2023
CVSS 3.x
7.4
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data corruption and information disclosure.

Weakness

The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

Affected Software

Name Vendor Start Version End Version
Epyc_7001_firmware Amd * naplespi_1.0.0.h (excluding)

Potential Mitigations

References