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Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck

CVE-2026-101887BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS

Low 3.5

In plain English

A low-severity security flaw in bluez-alsa from arkq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)3.5Low
Exploit odds (30 days)0.2%top 95.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12bluez-alsano fix listedDEBIAN-CVE-2026-101887
Debian:13bluez-alsano fix listedDEBIAN-CVE-2026-101887
Debian:14bluez-alsano fix listedDEBIAN-CVE-2026-101887
Ubuntu:22.04:LTSbluez-alsano fix listedUBUNTU-CVE-2026-101887
Ubuntu:24.04:LTSbluez-alsano fix listedUBUNTU-CVE-2026-101887
Ubuntu:26.04:LTSbluez-alsano fix listedUBUNTU-CVE-2026-101887
Ubuntu:26.10bluez-alsano fix listedUBUNTU-CVE-2026-101887

Affected products (as reported)

VendorProductVersions
arkq bluez-alsa 0 – before 1a84465dd860d1be9dcf62339c6273e9e0632dd2

Weakness: CWE-369 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References