{"id":"CVE-2026-5068","revision":"db7ecd1342cf447e819e93f3cc0ddfd4","records":[{"revision":"db7ecd1342cf447e819e93f3cc0ddfd4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-5068","aliases":[],"title":"bt: l2cap le coc: remote oob write via seg counter stored in net_buf user_data","description":"A remote, unauthenticated BLE peer can trigger a 2-byte out-of-bounds write in the Bluetooth host during L2CAP LE CoC SDU reassembly. When the application enables segmentation (via chan_ops.alloc_buf) and the chosen RX pool has a user_data_size smaller than 2 bytes, the segmentation counter stored in the net_buf user_data area is written out of bounds in l2cap_chan_le_recv_seg (subsys/bluetooth/host/l2cap.c). The observed effects are an AddressSanitizer abort and, without ASan, heap corruption / fatal error.","state":0,"publishedAt":"2026-06-09T06:20:23.745+00:00","modifiedAt":"2026-10-15T22:10:25.872+00:00","affected":[{"ecosystem":"Vendor product","name":"Zephyr","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageName\": \"Zephyr\",\n                    \"product\": \"Zephyr\",\n                    \"repo\": \"https://github.com/zephyrproject-rtos/zephyr\",\n                    \"vendor\": \"zephyrproject-rtos\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"4.3.1\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.14.0\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","score":7.6,"severity":"HIGH"}],"references":["https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-qrcq-hxwj-mqxm"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-5068","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-5068","identifiers":["CVE-2026-5068"]},"retained":false,"historicalAffected":[]}],"coverage":[]}