CVE-2026-15460

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Source

https://cve.org/CVERecord?id=CVE-2026-15460

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15460.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-15460

Aliases

GHSA-hx89-rm6c-hjrh

Published

2026-09-09T22:40:46Z

Modified

2026-10-21T09:41:15Z

Severity

5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator

Summary

Missing channel-state validation in Zephyr Bluetooth Classic L2CAP receive path

Details

The Bluetooth Classic (BR/EDR) L2CAP receive handler bt_l2cap_br_recv() in subsys/bluetooth/host/classic/l2cap_br.c dispatched inbound data PDUs based only on the destination channel ID, without checking that the target channel had reached the BT_L2CAP_CONNECTED state. A dynamic channel is assigned its RX CID and added to the connection's channel list while still in BT_L2CAP_CONNECTING (and later BT_L2CAP_CONFIG) — before configuration completes and, for PSMs that require security, before the peer is authenticated (l2cap_br_conn_req()).

Because the channel is already findable by bt_l2cap_br_lookup_rx_cid() during this window, a remote peer within radio range can send a data PDU addressed to that CID and have it processed on a not-yet-established channel. The dispatch keys off channel fields (BR_CHAN(chan)->rx.mode, rx.mps) that are only initialized during configuration by l2cap_br_conf(); since channel objects are pooled and bt_l2cap_br_chan_del() does not reset rx.mode or the reassembly buffer _sdu, a reused channel can carry stale state into the CONNECTING window and route the frame into the retransmission/flow-control path (bt_l2cap_br_ret_fc_recv()) with stale parameters and a possibly stale _sdu pointer.

The impact is delivery of attacker data to upper-layer protocol handlers on a half-open (and possibly unauthenticated) channel, plus operation on stale or partially initialized channel state on reused channel objects — leading to channel/link teardown (denial of service) and, in the stale-_sdu case, a dangling-pointer condition. The fix adds an explicit BR_CHAN(chan)->state < BT_L2CAP_CONNECTED guard that drops any data received before the channel is fully connected.

Database specific

{
    "cna_assigner":  "zephyr",
    "cwe_ids":  [
        "CWE-666"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15460.json"
}

References

Affected packages

Git / github.com/zephyrproject-rtos/zephyr

Affected ranges

Type

GIT

Repo

https://github.com/zephyrproject-rtos/zephyr

Events

Introduced

d4e799d77a36eaf6d678b357c207411ec32b2d62

Fixed

dccb09599635bdff17633fa7e9dab014b91dce90

Fixed

2738ee921ba61ba2e644c95bceba302896dd8c19

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.6.0"
                },
                {
                    "fixed":  "4.4.2"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "fixed":  "2738ee921ba61ba2e644c95bceba302896dd8c19"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15460.json"

vanir_signatures

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vanir_signatures_modified

"2026-10-21T09:41:15Z"