CVE-2026-101887: Divide By Zero in arkq bluez-alsa
BlueALSA (bluez-alsa/bluealsad) contains a division-by-zero vulnerability in its LC3plus sink decoder. This flaw can be triggered by a Bluetooth-adjacent attacker who sends a crafted RTP media header with a zero frame count, causing the daemon to crash. The issue affects builds compiled with LC3plus support enabled and results in a denial of service. The vulnerability has a low CVSS score of 2.1 and does not have known exploits in the wild.
AI Analysis
Technical Summary
CVE-2026-101887 is a division-by-zero vulnerability in the LC3plus sink decoder of bluez-alsa's bluealsad daemon. An attacker who can establish an A2DP source connection with a victim running bluealsad as an A2DP sink can send a specially crafted RTP media header containing a zero frame count field. This triggers a SIGFPE (floating point exception) in the decoding thread, crashing the daemon and causing denial of service. The vulnerability specifically affects builds compiled with LC3plus support enabled.
Potential Impact
Successful exploitation causes a denial of service by crashing the bluealsad daemon, disrupting Bluetooth audio streaming on affected systems. There is no indication of privilege escalation, data leakage, or remote code execution. The CVSS score of 2.1 reflects the low severity and limited impact.
Mitigation Recommendations
No patch or official fix information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, disabling LC3plus support in bluealsad or restricting A2DP source connections may reduce exposure.
CVE-2026-101887: Divide By Zero in arkq bluez-alsa
Description
BlueALSA (bluez-alsa/bluealsad) contains a division-by-zero vulnerability in its LC3plus sink decoder. This flaw can be triggered by a Bluetooth-adjacent attacker who sends a crafted RTP media header with a zero frame count, causing the daemon to crash. The issue affects builds compiled with LC3plus support enabled and results in a denial of service. The vulnerability has a low CVSS score of 2.1 and does not have known exploits in the wild.
CVSS v4.0
Score 2.1low
Affected software
arkq
bluez-alsa
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-101887 is a division-by-zero vulnerability in the LC3plus sink decoder of bluez-alsa's bluealsad daemon. An attacker who can establish an A2DP source connection with a victim running bluealsad as an A2DP sink can send a specially crafted RTP media header containing a zero frame count field. This triggers a SIGFPE (floating point exception) in the decoding thread, crashing the daemon and causing denial of service. The vulnerability specifically affects builds compiled with LC3plus support enabled.
Potential Impact
Successful exploitation causes a denial of service by crashing the bluealsad daemon, disrupting Bluetooth audio streaming on affected systems. There is no indication of privilege escalation, data leakage, or remote code execution. The CVSS score of 2.1 reflects the low severity and limited impact.
Mitigation Recommendations
No patch or official fix information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, disabling LC3plus support in bluealsad or restricting A2DP source connections may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-28T15:44:45.390Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abdca3b2a4e24523d43d3d2
Added to database: 10/01/2026, 02:49:31 UTC
Last enriched: 10/01/2026, 03:03:00 UTC
Last updated: 10/01/2026, 05:04:55 UTC
Views: 8
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