CVE-2019-8922Public exploit

Code execution via unchecked SDP attribute appends

Published Nov 29, 2021 · Updated Apr 15, 2026

Heap-based buffer overflow in BlueZ bluetoothd 5.17 through 5.48 allows physically proximate attackers to execute code via crafted SDP requests. In service_attr_req, extract_attrs passes requested attribute values to sdp_append_to_buf, whose memcpy appends them to a fixed response buffer without checking remaining capacity. Bluetooth must be enabled and discoverable; a malicious peer can negotiate an oversized L2CAP MTU and request enough SDP attributes to crash the root-running daemon or corrupt its heap for code execution.

CVSS severity8.8
High
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in BlueZ bluetoothd 5.17 through 5.48 allows physically proximate attackers to execute code via crafted SDP requests. In service_attr_req, extract_attrs passes requested attribute values to sdp_append_to_buf, whose memcpy appends them to a fixed response buffer without checking remaining capacity. Bluetooth must be enabled and discoverable; a malicious peer can negotiate an oversized L2CAP MTU and request enough SDP attributes to crash the root-running daemon or corrupt its heap for code execution.

The record

CVE
CVE-2019-8922
Published
Nov 29, 2021
Updated
Apr 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CanonicalCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.8NIST NVDAV:A/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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