CVE-2026-53072

Kernel memory corruption via unlocked Bluetooth callback

Published Jun 24, 2026 · Updated Jun 24, 2026

Use-after-free in the Linux Kernel Bluetooth stack allows physically proximate attackers to corrupt kernel memory through SCO connection requests. The hci_conn_request_evt() path invokes hci_connect_cfm(conn) without holding hdev->lock, although the callback assumes that lock protects the connection from concurrent deletion. A deferred SCO or eSCO listening socket with HCI_PROTO_DEFER must be active; the race can crash the kernel or compromise kernel memory, while ISO is not reachable through this event.

CVSS severity8.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel Bluetooth stack allows physically proximate attackers to corrupt kernel memory through SCO connection requests. The hci_conn_request_evt() path invokes hci_connect_cfm(conn) without holding hdev->lock, although the callback assumes that lock protects the connection from concurrent deletion. A deferred SCO or eSCO listening socket with HCI_PROTO_DEFER must be active; the race can crash the kernel or compromise kernel memory, while ISO is not reachable through this event.

The record

CVE
CVE-2026-53072
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.17
  2. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <385b2d0468a0871fc716c549fa3b0c257c7dbcb3
  3. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f
  4. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <5c7209a341ff2ac338b2b0375c34a307b37c9ac2
  5. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4
  6. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <6b4d226d01ab7da0d2027a2a1e3a6079152e5065
  7. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e
  8. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <c27224daf0b08efbb2b24ed64b6139b294f5473a
  9. Affected versionversion=70c464256310e1c3716099b9d02ece4169272f73 <c7777f534a8018ae4bb1c80d8925af4df588a314

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.17; version=70c464256310e1c3716099b9d02ece4169272f73 <385b2d0468a0871fc716c549fa3b0c257c7dbcb3; version=70c464256310e1c3716099b9d02ece4169272f73 <541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f; version=70c464256310e1c3716099b9d02ece4169272f73 <5c7209a341ff2ac338b2b0375c34a307b37c9ac2; version=70c464256310e1c3716099b9d02ece4169272f73 <60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4; version=70c464256310e1c3716099b9d02ece4169272f73 <6b4d226d01ab7da0d2027a2a1e3a6079152e5065; version=70c464256310e1c3716099b9d02ece4169272f73 <9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e; version=70c464256310e1c3716099b9d02ece4169272f73 <c27224daf0b08efbb2b24ed64b6139b294f5473a; version=70c464256310e1c3716099b9d02ece4169272f73 <c7777f534a8018ae4bb1c80d8925af4df588a314

Published CVSS scores

8.8LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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