DEBIAN-CVE-2020-26558

Advisory lineage Upstream: 1 Downstream: 4
Upstream
CVE-2020-26558
Published: 24 May 2021, 18:15
Last modified:28 Apr 2026, 20:19

Vulnerability Summary

Overall Risk (default)
low
17/100
CVSS Score
4.2 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 May 2021, 18:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:19
Last Modified
Vulnerability information updated

Description

Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.2CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Systems

  • debian•bluez

    < 5.55-3.1 | < 5.55-3.1 | < 5.55-3.1 | < 5.55-3.1

  • debian•linux

    < 5.10.40-1 | < 5.10.40-1 | < 5.10.40-1 | < 5.10.40-1

References (1)