ubuntu-cve-2026-10651
Vulnerability from osv_ubuntu
Published
2026-06-23 01:16
Modified
2026-07-15 17:48
Summary
Details
bt_sdp_parse_attribute() in subsys/bluetooth/host/classic/sdp.c validated only that the SDP record buffer held the type-marker byte plus the 2-byte attribute ID (a check of buf->len < 3) but then read a fourth byte, the data-element descriptor (type), via net_buf_simple_pull_u8(). Because net_buf_simple_pull_u8() dereferences buf->data[0] before its only bounds guard (an __ASSERT_NO_MSG that compiles out when CONFIG_ASSERT is disabled, the production default), a record of exactly three bytes (0x09 followed by a 2-byte attribute ID) causes a one-byte read past the end of the logical buffer. The parser is reachable from inbound, remote-controlled data: a Bluetooth BR/EDR peer acting as an SDP server returns discovery-response records that are stored verbatim in the client receive buffer and parsed via the public bt_sdp_get_attr()/bt_sdp_has_attr()/bt_sdp_record_parse() helpers. The over-read is bounded to a single byte that is used only as an internal length selector and is never leaked to the attacker; subsequent length checks then reject the malformed record. Realistic impact is therefore limited to an edge-case denial of service (a fault only if the record ends exactly at a mapped-memory boundary, or a deterministic assert panic when CONFIG_ASSERT=y). Affects Zephyr v4.3.0 and v4.4.0; fixed by adding sizeof(type) to the length check.
Severity
7.1 (High)
6.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-1build1"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-1build1"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-1build1"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-1build1"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-1build1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1",
"3.1.2-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-1build2"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-1build2"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-1build2"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-1build2"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-1build2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1build1",
"3.1.2-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-1build3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-1build3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1build3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-1build3"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-1build3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-1build3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1build3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-1.1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-1.1build1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1.1",
"3.1.2-1.1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-1.1build1"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-1.1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-1.1build1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1.1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzephyr4",
"binary_version": "3.1.2-4"
},
{
"binary_name": "libzephyr4-krb5",
"binary_version": "3.1.2-4"
},
{
"binary_name": "zephyr-clients",
"binary_version": "3.1.2-4"
},
{
"binary_name": "zephyr-server",
"binary_version": "3.1.2-4"
},
{
"binary_name": "zephyr-server-krb5",
"binary_version": "3.1.2-4"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "zephyr",
"purl": "pkg:deb/ubuntu/zephyr@3.1.2-4?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-1.1build1",
"3.1.2-4"
]
}
],
"aliases": [],
"details": "bt_sdp_parse_attribute() in subsys/bluetooth/host/classic/sdp.c validated only that the SDP record buffer held the type-marker byte plus the 2-byte attribute ID (a check of buf-\u003elen \u003c 3) but then read a fourth byte, the data-element descriptor (type), via net_buf_simple_pull_u8(). Because net_buf_simple_pull_u8() dereferences buf-\u003edata[0] before its only bounds guard (an __ASSERT_NO_MSG that compiles out when CONFIG_ASSERT is disabled, the production default), a record of exactly three bytes (0x09 followed by a 2-byte attribute ID) causes a one-byte read past the end of the logical buffer. The parser is reachable from inbound, remote-controlled data: a Bluetooth BR/EDR peer acting as an SDP server returns discovery-response records that are stored verbatim in the client receive buffer and parsed via the public bt_sdp_get_attr()/bt_sdp_has_attr()/bt_sdp_record_parse() helpers. The over-read is bounded to a single byte that is used only as an internal length selector and is never leaked to the attacker; subsequent length checks then reject the malformed record. Realistic impact is therefore limited to an edge-case denial of service (a fault only if the record ends exactly at a mapped-memory boundary, or a deterministic assert panic when CONFIG_ASSERT=y). Affects Zephyr v4.3.0 and v4.4.0; fixed by adding sizeof(type) to the length check.",
"id": "UBUNTU-CVE-2026-10651",
"modified": "2026-07-15T17:48:10Z",
"published": "2026-06-23T01:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-10651"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-10651"
},
{
"type": "REPORT",
"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p93g-3r68-cj53"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-10651"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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