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CVE-2020-27153

29
FAUCET Score

CVE-2020-27153 is a double free vulnerability in BlueZ versions prior to 5.55, specifically within the gatttool disconnect_cb() routine, affecting various Linux distributions including Debian, openSUSE, and Leap. This high-severity flaw (CVSS 8.6) allows a remote, unauthenticated attacker to cause a denial of service or potentially achieve code execution during service discovery. While the vulnerability is critical, there is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.55CPE matchmatch criteria
cpe:2.3:a:bluez:bluez:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
15.2CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.24%
Probability of exploitation in next 30 days
EPSS Percentile
90.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0424 is in the 82nd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: bluez-0:5.52-4.el8
View patch

Vendor Advisories (1)

redhatCVE-2020-27153Moderate

bluez: double free in gatttool client disconnect callback handler in src/shared/att.c could lead to DoS or RCE

Sep 6, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-11/msg00034.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-11/msg00036.html
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a
PatchThird Party Advisory
github.com / bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/10/msg00022.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202011-01
Third Party Advisory
debian.org / security/2021/dsa-4951
Third Party Advisory