UBUNTU-CVE-2026-10651

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Source
https://ubuntu.com/security/CVE-2026-10651
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-10651
Upstream
Published
2026-06-23T01:16:00Z
Modified
2026-07-15T19:45:16Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:16.04:LTS
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.2-1
3.1.2-1build1

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"
Ubuntu:18.04:LTS
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.2-1build1
3.1.2-1build2

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"
Ubuntu:20.04:LTS
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"
Ubuntu:22.04:LTS
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"
Ubuntu:24.04:LTS
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"
Ubuntu:25.10
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"
Ubuntu:26.04:LTS
zephyr

Package

Name
zephyr
Purl
pkg:deb/ubuntu/zephyr?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.2-1.1build1
3.1.2-4

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10651.json"