CVE-2020-27153

Summary

CVE	CVE-2020-27153
State	PUBLISHED
Assigner	mitre
Source Priority	CVE Program / NVD first with legacy fallback
Published	2020-10-15 03:15:12 UTC
Updated	2026-04-15 21:17:02 UTC
Description	In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c. A remote attacker could potentially cause a denial of service or code execution, during service discovery, due to a redundant disconnect MGMT event.

Risk And Classification

Primary CVSS: v3.1 8.6 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

EPSS: 0.018990000 probability, percentile 0.832550000 (date 2026-04-15)

Problem Types: CWE-415 | n/a | CWE-415 CWE-415 Double Free

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	8.6	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`
3.1	ADP	DECLARED	8.6	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`
3.1	134c704f-9b21-4f2e-91b3-4a467353bcc0	Secondary	8.6	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`
2.0	[email protected]	Primary	7.5		`AV:N/AC:L/Au:N/C:P/I:P/A:P`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v2.0 Breakdown

Access Vector

Network

Access Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

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

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Bluez	Bluez	All	All	All	All
Operating System	Debian	Debian Linux	10.0	All	All	All
Operating System	Debian	Debian Linux	9.0	All	All	All
Operating System	Opensuse	Leap	15.1	All	All	All
Operating System	Opensuse	Leap	15.2	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Na	N/a	affected n/a	Not specified

References

Reference	Source	Link	Tags
Release 5.55 · bluez/bluez@5a180f2 · GitHub	af854a3a-2127-422b-91ae-364da2661108	github.com	Patch, Third Party Advisory
BlueZ: Arbitrary code execution (GLSA 202011-01) — Gentoo security	af854a3a-2127-422b-91ae-364da2661108	security.gentoo.org	Third Party Advisory
shared/att: Fix possible crash on disconnect · bluez/bluez@1cd644d · GitHub	af854a3a-2127-422b-91ae-364da2661108	github.com	Patch, Third Party Advisory
1884817 – (CVE-2020-27153) CVE-2020-27153 bluez: double free in gatttool client disconnect callback handler in src/shared/att.c could lead to DoS or RCE	af854a3a-2127-422b-91ae-364da2661108	bugzilla.redhat.com	Issue Tracking, Third Party Advisory
[security-announce] openSUSE-SU-2020:1880-1: moderate: Security update f	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org	Mailing List, Third Party Advisory
[SECURITY] [DLA 2410-1] bluez security update	af854a3a-2127-422b-91ae-364da2661108	lists.debian.org	Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-4951-1 bluez	af854a3a-2127-422b-91ae-364da2661108	www.debian.org	Third Party Advisory
[security-announce] openSUSE-SU-2020:1876-1: moderate: Security update f	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org	Mailing List, Third Party Advisory
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Legacy QID Mappings

159192 Oracle Enterprise Linux Security Update for bluez (ELSA-2021-1598)
178745 Debian Security Update for bluez (DSA 4951-1)
198407 Ubuntu Security Notification for BlueZ vulnerabilities (USN-4989-1)
239332 Red Hat Update for bluez (RHSA-2021:1598)
500069 Alpine Linux Security Update for bluez
670563 EulerOS Security Update for bluez (EulerOS-SA-2021-2321)
670599 EulerOS Security Update for bluez (EulerOS-SA-2021-2357)
670986 EulerOS Security Update for bluez (EulerOS-SA-2021-2573)
940106 AlmaLinux Security Update for bluez (ALSA-2021:1598)
960727 Rocky Linux Security Update for bluez (RLSA-2021:1598)