CVE Vulnerabilities

CVE-2021-26313

Observable Timing Discrepancy

Published: Jun 09, 2021 | Modified: Nov 21, 2024
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
2.1 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution of overwritten instructions, may cause an incorrect speculation and could result in data leakage.

Weakness

Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Affected Software

Name Vendor Start Version End Version
Xen Xen * *
Xen Ubuntu bionic *
Xen Ubuntu groovy *
Xen Ubuntu hirsute *
Xen Ubuntu impish *
Xen Ubuntu kinetic *
Xen Ubuntu lunar *
Xen Ubuntu mantic *
Xen Ubuntu trusty *
Xen Ubuntu xenial *

References