All vulnerabilities
CVE-2026-101887

bluez-alsa: BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS

arkq bluez-alsa
Open in ThreatlineRecord JSON
CVSS
2.1Low
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.15%Chance of exploitation activity in the next 30 days, higher than 4% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1a84465dd860d1be9dcf62339c6273e9e0632dd2Fixed versionCVE List
Published1 Oct 2026Updated 1 Oct 2026CVE List

What fixes it

  • 1a84465dd860d1be9dcf62339c6273e9e0632dd2bluez-alsaCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 1

  • bluez-alsaaffected: all versions before 1a84465dd860d1be9dcf62339c6273e9e0632dd2CVE List

References 2