# CVE-2026-16473: Sbc: sbc: heap out-of-bounds read via crafted sbc audio frame

Status: published. Published: 2026-07-22. Updated: 2026-11-05.

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.

## Remediation

- workaround: There is no practical mitigation short of disabling Bluetooth A2DP audio decoding entirely. The SBC codec is mandatory for A2DP and the decode path is invoked automatically on incoming Bluetooth audio streams. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (sbc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (sbc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (sbc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (sbc): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: CNA: redhat

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.30% as of 2026-11-05; percentile 22.57%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-16473 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2503650 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://git.kernel.org/pub/scm/bluetooth/sbc.git (CNA: redhat)

- https://lore.kernel.org/linux-bluetooth/1660735014.5089519.1785359719739@mail.yahoo.com/ (CNA: redhat)

- https://access.redhat.com/security/cve/CVE-2026-16473 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2503650 (secalert@redhat.com)

- https://git.kernel.org/pub/scm/bluetooth/sbc.git (secalert@redhat.com)

- https://lore.kernel.org/linux-bluetooth/1660735014.5089519.1785359719739@mail.yahoo.com/ (secalert@redhat.com)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-16473; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16473; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-16473; retrieved 2026-11-05; source updated Not reported

Revision: 8c1df7334881ab294b290e3a4fb7e6fb8f936bf2b25bbbc7f80a61108d0101c1

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