8.6

CVE-2020-27153: bluez Double Free

Modified
AliasesALPINE-CVE-2020-27153MGASA-2020-0419SUSE-SU-2020:3165-1
Published 15-10-2020Last modified 15-04-2026

Vulnerability summary

CVE-2020-27153 is a high (CVSS 8.6) Double Free vulnerability in bluez. EPSS estimates a 4.32% chance of exploitation in the next 30 days, higher than 91.1% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 8.6 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
4.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
DSA-4951-1SUSE-SU-2020:3034-1USN-4989-1USN-4989-2

Timeline

  1. 15-10-2020
    PublishedVulnerability first disclosed.
  2. 15-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 6 sources · 2 versions

EPSS trend

Probability

4.32%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

No change 0.00 pp

From 4.32% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat12 products
  • bluez< 0:5.52-4.el8
  • bluez-cups< 0:5.52-4.el8
  • bluez-cups-debuginfo< 0:5.52-4.el8
  • bluez-debuginfo< 0:5.52-4.el8
  • bluez-debugsource< 0:5.52-4.el8
Opensuse3 products
  • leapEOL15.1 | 15.2
  • bluez&distro=openSUSE Leap 15.1< 5.48-lp151.8.15.1
  • bluez&distro=openSUSE Leap 15.2< 5.48-lp152.12.6.1
Suse3 products
  • bluez&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 5.48-5.28.1
  • bluez&distro=SUSE Linux Enterprise Module for Desktop Applications 15 SP1< 5.48-5.28.1
  • bluez&distro=SUSE Linux Enterprise Workstation Extension 15 SP1< 5.48-5.28.1
Debian2 products
Alpine1 product
  • bluez< 5.50-r5 | < 5.52-r2 | < 5.54-r6 | < 5.50-r2
Bluez1 product
Mageia1 product
  • bluez< 5.54-1.1.mga7
Ubuntu1 product
  • bluez< 5.37-0ubuntu5.3+esm1 | < 5.48-0ubuntu3.5 | < 5.53-0ubuntu3.2

8 vendors · 24 products

References

30 links
Show all 30 references