CVE & CISA-KEV Catalog

CVE-2019-8921

MEDIUM
6.5
CVSS v3
NVD

Description

An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the same.

CWE-345

How to fix

Remediation Available
bluezDebian
Fixed in:5.54-1CVE-2019-8921
Fixed in:5.54-1CVE-2019-8921
Fixed in:5.54-1CVE-2019-8921
Fixed in:5.54-1CVE-2019-8921
bluezUbuntu
Fixed in:5.37-0ubuntu5.3+esm5USN-7265-1
libbluetooth3Ubuntu
Fixed in:5.37-0ubuntu5.3+esm5USN-7265-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityNone
AvailabilityNone

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

Exploit Intelligence

0.94%probability of exploitation in 30 days
56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-15.