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BlueZ SBC CVE-2026-16473

| EUVDEUVD-2026-47623 MEDIUM
Out-of-bounds Read (CWE-125)
2026-07-22 redhat GHSA-2xmm-4jcc-wgxq
4.3
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
4.3 MEDIUM
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
4.3 MEDIUM

Adjacent vector (Bluetooth range), no auth needed per A2DP protocol; impact is limited to one-byte read, so C:L with no integrity or availability impact.

3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
4.3 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Jul 22, 2026 - 11:15 vuln.today
CVE Published
Jul 22, 2026 - 10:07 cve.org
MEDIUM 4.3

DescriptionCVE.org

A flaw was found in the sbc library (BlueZ SBC codec). An off-by-one error in the SBC frame decoder allows a crafted audio payload to trigger a one-byte heap out-of-bounds read. This could allow an adjacent attacker streaming Bluetooth audio to read a single byte of adjacent heap memory.

AnalysisAI

Off-by-one heap out-of-bounds read in the BlueZ SBC (Sub-Band Coding) frame decoder allows a Bluetooth-adjacent unauthenticated attacker to leak a single byte of heap memory by streaming a crafted audio payload. Red Hat Enterprise Linux 7 through 10 are confirmed affected via the bundled sbc library. No public exploit code exists and this vulnerability is not listed in CISA KEV, making active exploitation unlikely; the impact is constrained to minor information disclosure of a single heap byte.

Technical ContextAI

The SBC codec (Sub-Band Coding) is the mandatory baseline audio codec for Bluetooth A2DP (Advanced Audio Distribution Profile) streaming. The vulnerability resides in the sbc library maintained under the BlueZ Bluetooth stack at git.kernel.org/pub/scm/bluetooth/sbc.git. CWE-125 (Out-of-bounds Read) identifies the root cause as an off-by-one indexing error in the SBC frame parsing logic, where the decoder reads one byte past the intended buffer boundary into adjacent heap memory. CPE strings confirm the affected component is present in Red Hat Enterprise Linux 7, 8, 9, and 10 as a shared library dependency of BlueZ. Because SBC decoding occurs on received audio frames, the vulnerability is exploitable by any peer within Bluetooth radio range without any prior authentication.

RemediationAI

No vendor-released patch with an exact fixed version has been identified from the available input data; the upstream sbc git repository at https://git.kernel.org/pub/scm/bluetooth/sbc.git should be monitored for a tagged fix release. Red Hat Enterprise Linux users should apply any available errata from https://access.redhat.com/security/cve/CVE-2026-16473 once published. As a compensating control, disabling Bluetooth A2DP audio streaming on systems where it is not required eliminates the attack surface entirely; this can be achieved by blocking the A2DP profile via BlueZ's main.conf (set DisablePlugins=a2dp) or by disabling the Bluetooth service altogether if audio streaming is not operationally needed. Restricting Bluetooth device pairing via a MAC address allowlist reduces the risk of crafted audio from untrusted peers, though this adds operational overhead. Note that disabling A2DP will break Bluetooth headset and speaker functionality.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected

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CVE-2026-16473 vulnerability details – vuln.today

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