CVE-2026-101887
BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS
- State
- Published
- Severity
- 2.1 Low
- Published
- Oct 1, 2026
- Updated
- Oct 1, 2026
- Reserved
- Sep 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.5 Low | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-369 Divide By Zero
Affected Products
| Product | Versions |
|---|---|
bluez-alsaarkq |
|
References
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