In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine…
Priority MEDIUM 50CWE-415Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · High
- Fix status
- Partial Red Hat: 3 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04324 91st percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 3 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:bluez:bluez:*:*:*:*:*:*:*:* | before 5.55 | Vulnerable | BlueZ |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
- cpe:2.3:a:bluez:bluez:*:*:*:*:*:*:*:* Versions before 5.55 Vulnerable ·BlueZ
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
Remediation
Red Hat 1 advisory
- RHSA-2021:1598 Released 2021-05-18 · Red Hat rating Moderatebluez security update
- Red Hat CodeReady Linux Builder (v. 8) bluez-libs-devel-5.52-4.el8
- Red Hat Enterprise Linux AppStream (v. 8) bluez-cups-5.52-4.el8
- Red Hat Enterprise Linux BaseOS (v. 8) bluez-5.52-4.el8, bluez-hid2hci-5.52-4.el8, bluez-libs-5.52-4.el8 +1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2021:1598 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:1598 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:1598 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27153
- 2026-10-03 Alias added: GHSA-hrr3-cwf8-mjp6
References
Patch 2
Sources
- CVE-2020-27153 · CVE Program
- CVE-2020-27153 · NVD
- FIRST EPSS
- GHSA-hrr3-cwf8-mjp6 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-27153 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences