CVE-2020-26558
bluez: Passkey Entry protocol of the Bluetooth Core is vulnerable to an impersonation attack
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 25, 2021
Updated · November 21, 2025
Description
A vulnerability was found in the bluez, where Passkey Entry protocol used in Secure Simple Pairing (SSP), Secure Connections (SC) and LE Secure Connections (LESC) of the Bluetooth Core Specification is vulnerable to an impersonation attack where an active attacker can impersonate the initiating device without any previous knowledge.
Statement
Red Hat Product Security is aware of this issue and is currently assessing the impact on Red Hat supported products. Corresponding entry in the Red Hat CVE database (https://access.redhat.com/security/security-updates/#/cve) will be updated with latest information as the assessment progresses.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 4.2CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1 · 4.6CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE-287 · Improper Authentication