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Linux Kernel EUVDEUVD-2026-67456

| CVE-2026-80721 HIGH
2026-08-28 Linux GHSA-28qm-9qmh-h457
Information Disclosure Linux Red Hat Suse
8.8
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
8.8 HIGH
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.5 HIGH

AV:A correct for Bluetooth; AC upgraded to H due to required race condition timing; PR:N retained as no attacker authentication needed.

3.1 AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Aug 29, 2026 - 08:15 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
8.8 (HIGH)
Patch available
Aug 28, 2026 - 09:02 EUVD
CVE Published
Aug 28, 2026 - 06:53 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 28, 2026 - 06:53 cve.org
HIGH 8.8

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: ensure no dangling hcon references in iso_conn

After iso_conn_del(), ISO sockets should not dereference the hcon any more. Currently, clearing iso_conn::hcon relies on iso_conn_del() releasing the last reference to the iso_conn.

Simplify this by explicitly clearing conn->hcon in iso_conn_del(), to avoid more complex reasoning on races about who holds the last reference.

AnalysisAI

Dangling pointer dereference in the Linux kernel Bluetooth ISO subsystem exposes systems running kernel versions prior to 6.18.44, 7.1.8, and 7.2 to potential kernel memory corruption from adjacent Bluetooth attackers. After iso_conn_del() is invoked, ISO sockets may continue to dereference the freed hcon (HCI connection) pointer due to imprecise reference-counting logic, creating a use-after-free-class condition in kernel space. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to be within Bluetooth radio range (typically 10-100 meters depending on hardware class) - this is the primary physical constraint limiting exposure. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD CVSS score of 8.8 (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) presents an optimistic attacker view: the adjacent network vector is accurate for Bluetooth, but the AC:L assessment likely understates the race-condition timing complexity inherent in triggering a use-after-free through concurrent ISO connection teardown and socket operations. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to Linux kernel 7.2, 7.1.8, or 6.18.44, which contain the upstream fix explicitly clearing conn->hcon in iso_conn_del(). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify and inventory all systems running Linux kernels prior to versions 6.18.44, 7.1.8, or 7.2, prioritizing Bluetooth-enabled servers and endpoints. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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EUVD-2026-67456 vulnerability details – vuln.today
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