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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bluez | 5.55-1 | — |
| Debian 13 | bluez | 5.55-1 | — |
| Debian 12 | bluez | 5.55-1 | — |
| Debian 10 | bluez | 5.50-1.2~deb10u2 | DSA-4951-1 |
| Debian 9 | bluez | 5.43-2+deb9u3 | DLA-2410-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | bluez | 5.53-0ubuntu3.2 | USN-4989-1 |
| Ubuntu 18.04 LTS | bluez | 5.48-0ubuntu3.5 | USN-4989-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | bluez | 5.37-0ubuntu5.3+esm1 | USN-4989-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | bluez +5 | 5.52-4.el8 | RHSA-2021:1598 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | bluez-libs-devel | 5.52-4.el8.alma | ALSA-2021:1598 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | bluez | 5.52-4.el8 | RLSA-2021:1598 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | bluez | 5.48-13.3.1 | SUSE-SU-2020:3034-1 |
| SLES 15 SP1 | bluez | 5.48-5.28.1 | SUSE-SU-2020:3165-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | bluez | 5.48-lp152.12.6.1 | openSUSE-SU-2020:1880-1 |
| openSUSE Leap 15.1 | bluez | 5.48-lp151.8.15.1 | openSUSE-SU-2020:1876-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.12 | bluez | 5.54-r6 | — |
| Alpine v3.11 | bluez | 5.52-r2 | — |
| Alpine v3.10 | bluez | 5.50-r5 | — |
| Alpine v3.9 | bluez | 5.50-r2 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bluez +5 | 5.52-4.el8 | ELSA-2021-1598 |
Advisories 12
- ALSA-2021:1598 Moderate: bluez security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:1598 Red Hat Security Advisory: bluez security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4989-2 bluez vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-4989-1 bluez vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-4951-1 bluez - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2410-1 bluez - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:1598 Moderate: bluez security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2020:3034-1 Security update for bluez SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3165-1 Security update for bluez SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1880-1 Security update for bluez SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1876-1 Security update for bluez SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2021-1598 Moderate: bluez security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07
- https://github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a
- https://bugzilla.redhat.com/show_bug.cgi?id=1884817
- [debian-lts-announce] 20201021 [SECURITY] [DLA 2410-1] bluez security update mailing-list
- GLSA-202011-01 vendor-advisory
- openSUSE-SU-2020:1876 vendor-advisory
- openSUSE-SU-2020:1880 vendor-advisory
- DSA-4951 vendor-advisory