A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48.
A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on whether there is enough space in the destination buffer. The function simply appends all data passed to it. The values of all attributes that are requested are appended to the output buffer. There are no size checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by process_request (in sdpd-request.c), which also allocates the response buffer.
- Published
- Nov 29, 2021
- Updated
- Jun 16, 2026
- EPSS
- 1.5% · 74th percentile
- CWE
- CWE-787
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| bluez | bluez | cpe:2.3:a:bluez:bluez |
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- bluez bluezup to 5.48 inclusive
- debian debian linux10.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | bluez | before 5.50-1.2~deb10u3 | 5.50-1.2~deb10u3 |
| Debian:12 | bluez | before 5.54-1 | 5.54-1 |
| Debian:9 | bluez | before 5.43-2+deb9u5 | 5.43-2+deb9u5 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | bluez | before 5.48-150200.13.17.1 | 5.48-150200.13.17.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | bluez | before 5.48-150200.13.8.1 | 5.48-150200.13.8.1 |
| SUSE:Linux Enterprise High Performance Computing 15-ESPOS | bluez | before 5.48-150000.5.34.1 | 5.48-150000.5.34.1 |
| SUSE:Linux Enterprise High Performance Computing 15-ESPOS | bluez | before 5.48-150000.5.41.1 | 5.48-150000.5.41.1 |
| SUSE:OpenStack Cloud 9 | bluez | before 5.13-5.26.1 | 5.13-5.26.1 |
Same product
bluez: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-8805BlueZ HID over GATT Profile Improper Access Control Remote Code Execution Vulnerability36Monitor
- CVE-2022-0204A heap overflow vulnerability was found in bluez in versions prior to 5.63.36Monitor
- CVE-2021-43400An issue was discovered in gatt-database.c in BlueZ 5.61.36Monitor
- CVE-2022-39177BlueZ before 5.59 allows physically proximate attackers to cause a denial of service because malformed and invalid capabilities can be proce35Monitor
- CVE-2022-39176BlueZ before 5.59 allows physically proximate attackers to obtain sensitive information because profiles/audio/avrcp.c does not validate par35Monitor
- CVE-2020-27153In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c.35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:bluez | 5.54-1 · Debian:12 | Package registry (OSV) |
| suse:bluez | 5.48-150000.5.34.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOS | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone on the same network segment can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.debian.org/debian-lts-announce/2022/10/msg00026.html
- security.netapp.com/advisory/ntap-20211203-0002/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.