EUVD-2026-67456
GHSA-28qm-9qmh-h457
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:A correct for Bluetooth; AC upgraded to H due to required race condition timing; PR:N retained as no attacker authentication needed.
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
Lifecycle Timeline
5DescriptionCVE.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
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. |
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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External POC / Exploit Code
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