CVE-2026-101887

LOW 3.5

BlueALSA bluealsad LC3plus Decoder Division-by-Zero DoS

CVSS Score

3.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-369
Vendor	arkq
Product	bluez-alsa
Published	Oct 1, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

arkq / bluez-alsa

0 < 1a84465dd860d1be9dcf62339c6273e9e0632dd2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/arkq/bluez-alsa/commit/1a84465dd860d1be9dcf62339c6273e9e0632dd2 vulncheck.com: https://www.vulncheck.com/advisories/bluealsa-bluealsad-lc3plus-decoder-division-by-zero-dos

Credits

Harsh Raj Singhania VulnCheck