BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS (CVE-2026-101887) | HOL Guard CVE

Low · CVSS 2.1CVE-2026-101887

BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS

Answer in brief

CVE-2026-101887 records a Low severity (CVSS 2.1) vulnerability in BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS. The current sources do not mark it as known exploited. The current feed maps arkq/bluez-alsa (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 2.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps arkq/bluez-alsa (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
arkq/bluez-alsageneric	>=0 <1a84465dd860d1be9dcf62339c6273e9e0632dd2	1a84465dd860d1be9dcf62339c6273e9e0632dd2

Recommended response

Check inventory. Check lockfiles and deployed manifests for arkq/bluez-alsa.
Review the reported fix. Update arkq/bluez-alsa to 1a84465dd860d1be9dcf62339c6273e9e0632dd2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 1, 2026

Sources and claim methodology

Upstream source description

BlueALSA (bluez-alsa/bluealsad) contains a division-by-zero vulnerability in the LC3plus sink decoder (a2dp-lc3plus.c, a2dp_lc3plus_dec_thread) that allows a Bluetooth-adjacent attacker to crash the daemon by sending a crafted RTP media header with an attacker-controlled frame count field set to zero. Attackers can establish an A2DP source connection with an LC3plus session negotiated against a victim running bluealsad as an A2DP sink and transmit a non-fragmented LC3plus media header with a zero frame count to trigger a SIGFPE in the decoding thread, causing a denial of service on builds compiled with LC3plus support enabled.

Quoted source text, attributed separately from HOL analysis.