{"id":"UBUNTU-CVE-2026-101887","details":"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.","modified":"2026-10-02T22:30:12.499793032Z","published":"2026-10-02T00:00:00Z","upstream":["CVE-2026-101887"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-101887"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-101887"},{"type":"REPORT","url":"https://github.com/arkq/bluez-alsa/commit/1a84465dd860d1be9dcf62339c6273e9e0632dd2"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/bluealsa-bluealsad-lc3plus-decoder-division-by-zero-dos"}],"affected":[{"package":{"name":"bluez-alsa","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/bluez-alsa?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.0-2","binary_name":"bluez-alsa-utils"},{"binary_name":"libasound2-plugin-bluez","binary_version":"3.0.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101887.json"}},{"package":{"name":"bluez-alsa","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/bluez-alsa?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.0-2","4.1.1-1","4.1.1-1build1","4.1.1-1build2","4.1.1-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"bluez-alsa-utils","binary_version":"4.1.1-1build3"},{"binary_name":"libasound2-plugin-bluez","binary_version":"4.1.1-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101887.json"}},{"package":{"name":"bluez-alsa","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/bluez-alsa?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-3","4.3.1-3.1"],"ecosystem_specific":{"binaries":[{"binary_name":"bluez-alsa-utils","binary_version":"4.3.1-3.1"},{"binary_version":"4.3.1-3.1","binary_name":"libasound2-plugin-bluez"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101887.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}