PT-2021-7064 · Bluez+5 · Bluez+5

Published 2021-06-08 · Updated 2025-11-04 · CVE-2021-43400

Positive Technologies (AI Summary)

CVSS v2.0

9.4

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:N

Name of the Vulnerable Software and Affected Versions BlueZ version 5.61

Description A use-after-free issue can occur in the gatt-database.c file when a client disconnects during D-Bus processing of a WriteValue call, potentially allowing a remote attacker to access confidential information.

Recommendations For BlueZ version 5.61, consider disabling the WriteValue call processing until a patch is available to prevent exploitation of the use-after-free issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2021-3193

BDU:2022-03135

CVE-2021-43400

DLA-3157-1

DLA-3879-1

MGASA-2021-0532

OESA-2022-1527

OESA-2022-2047

OPENSUSE-SU-2022_3981-1

SUSE-SU-2022:3687-1

SUSE-SU-2022:3691-1

SUSE-SU-2022:3981-1

USN-5155-1

Affected Products

Alt Linux

Astra Linux

Bluez

Linuxmint

Suse

Ubuntu

References · 51

• https://osv.dev/vulnerability/UBUNTU-CVE-2021-43400 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2022-0819SE17 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-43400 · Vendor Advisory
• https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8 · Patch
• https://osv.dev/vulnerability/DLA-3879-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5155-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:3981-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-43400 · Security Note
• https://ubuntu.com/security/CVE-2021-41229 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:3691-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-43400 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3658 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0532 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0129 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-43400 · Security Note