{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10658","assignerOrgId":"e2e69745-5e70-4e92-8431-deb5529a81ad","state":"PUBLISHED","assignerShortName":"zephyr","dateReserved":"2026-06-02T15:24:35.422Z","datePublished":"2026-06-22T23:58:47.022Z","dateUpdated":"2026-06-23T12:20:56.564Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","packageName":"Zephyr","product":"Zephyr","repo":"https://github.com/zephyrproject-rtos/zephyr","vendor":"zephyrproject-rtos","versions":[{"lessThanOrEqual":"4.4.0","status":"affected","version":"*","versionType":"git"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Bluetooth Host ISO RX Missing SDU Header Length Validation in bt_iso_recv() Leads to DoS"}],"value":"A missing length validation in the Zephyr Bluetooth Host ISO receive path can be triggered by malformed HCI ISO data. In bt_iso_recv() (subsys/bluetooth/host/iso.c), when processing PB=START/SINGLE fragments, the code pulls a TS SDU header (8 bytes, ts=1) or a non-TS SDU header (4 bytes, ts=0) without first verifying that buf->len contains at least that many bytes. The outer HCI ISO length check in hci_iso() validates payload length consistency but not the minimum inner SDU header size, so a packet with payload length 1 passes hci_iso() and then reaches net_buf_pull_mem(), which asserts buf->len >= len. As a result, malformed ISO traffic deterministically triggers a kernel assert (denial of service) in assert-enabled builds, and in non-assert builds the same path may proceed with an undersized buffer, leading to out-of-bounds read behavior. The issue affects products using the Zephyr Host with CONFIG_BT_ISO_RX enabled, particularly where incoming HCI data can be influenced by a malicious or compromised controller or malformed forwarded ISO traffic."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"providerMetadata":{"orgId":"e2e69745-5e70-4e92-8431-deb5529a81ad","shortName":"zephyr","dateUpdated":"2026-06-22T23:58:47.022Z"},"references":[{"url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-26g8-rmpf-j6cw"}],"source":{"discovery":"UNKNOWN"},"title":"Bluetooth Host ISO RX Missing SDU Header Length Validation in bt_iso_recv() Leads to DoS","x_generator":{"engine":"swg-tools/create-cve-info"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-125","lang":"en","description":"CWE-125 Out-of-bounds Read"}]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-23T12:20:39.798180Z","id":"CVE-2026-10658","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-23T12:20:56.564Z"}}]}}