CVE-2026-52918 - Vulnerability Details

- Bluetooth: serialize accept_q access

Description

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

Bluetooth: serialize accept_q access

bt_sock_poll() walks the accept queue without synchronization, while
child teardown can unlink the same socket and drop its last reference.
The unsynchronized accept queue walk has existed since the initial
Bluetooth import.

Protect accept_q with a dedicated lock for queue updates and polling.
Also rework bt_accept_dequeue() to take temporary child references under
the queue lock before dropping it and locking the child socket.

Published: 2026-06-24

Score: 8.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< d9ce4de05df2385c19e2c7d12f529144e1a44af1
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 41c8c1c7923e86e0eb59cfb4279349112756a336
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 4ec17782fd186f901a7329605d11048b085b945a
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< be43e6b4043113c3b3cf887c3c8350f67140274c
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 85f8674cae82053f1e6bab295f6a8422cca14db5
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 8b4c412e001b0c670eb937beab491af974da55b3
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< a218bf69eb51fefe59a3976fa8925261141f681c
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< e83f5e24da741fa9405aeeff00b08c5ee7c37b88

Linux

affected

Version	Status	Constraints
`2.6.12`	affected	—
`0`	unaffected	< 2.6.12
`5.10.259`	unaffected	≤ 5.10.*
`5.15.210`	unaffected	≤ 5.15.*
`6.1.176`	unaffected	≤ 6.1.*
`6.6.142`	unaffected	≤ 6.6.*
`6.12.92`	unaffected	≤ 6.12.*
`6.18.34`	unaffected	≤ 6.18.*
`7.0.11`	unaffected	≤ 7.0.*
`7.1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d9ce4de05df2385c19e2c7d12f529144e1a44af1)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,41c8c1c7923e86e0eb59cfb4279349112756a336)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,4ec17782fd186f901a7329605d11048b085b945a)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,be43e6b4043113c3b3cf887c3c8350f67140274c)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,85f8674cae82053f1e6bab295f6a8422cca14db5)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8b4c412e001b0c670eb937beab491af974da55b3)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a218bf69eb51fefe59a3976fa8925261141f681c)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e83f5e24da741fa9405aeeff00b08c5ee7c37b88)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`2.6.12`	affected	semver	—
`[0,2.6.12)`	unaffected	semver	—
`[5.10.259,5.11.0)`	unaffected	semver	—
`[5.15.210,5.16.0)`	unaffected	semver	—
`[6.1.176,6.2.0)`	unaffected	semver	—
`[6.6.142,6.7.0)`	unaffected	semver	—
`[6.12.92,6.13.0)`	unaffected	semver	—
`[6.18.34,6.19.0)`	unaffected	semver	—
`[7.0.11,7.1.0)`	unaffected	semver	—
`[7.1,*]`	unaffected	semver	—

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00266.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336
https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a
https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5
https://git.kernel.org/stable/c/8b4c412e001b0c670eb937beab491af974da55b3
https://git.kernel.org/stable/c/a218bf69eb51fefe59a3976fa8925261141f681c
https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c
https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1
https://git.kernel.org/stable/c/e83f5e24da741fa9405aeeff00b08c5ee7c37b88
https://lore.kernel.org/linux-cve-announce/2026062429-CVE-2026-52918-42b9@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-52918
https://www.cve.org/CVERecord?id=CVE-2026-52918

History

Sun, 28 Jun 2026 08:00:00 +0000

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}`	cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}`

Thu, 25 Jun 2026 00:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-820
References		https://lore.kernel.org/linux-cve-announce/2026062429-CVE-2026-52918-42b9@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-52918 https://www.cve.org/CVERecord?id=CVE-2026-52918
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Moderate`

Wed, 24 Jun 2026 07:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: Bluetooth: serialize accept_q access bt_sock_poll() walks the accept queue without synchronization, while child teardown can unlink the same socket and drop its last reference. The unsynchronized accept queue walk has existed since the initial Bluetooth import. Protect accept_q with a dedicated lock for queue updates and polling. Also rework bt_accept_dequeue() to take temporary child references under the queue lock before dropping it and locking the child socket.
Title		Bluetooth: serialize accept_q access
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336 https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5 https://git.kernel.org/stable/c/8b4c412e001b0c670eb937beab491af974da55b3 https://git.kernel.org/stable/c/a218bf69eb51fefe59a3976fa8925261141f681c https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1 https://git.kernel.org/stable/c/e83f5e24da741fa9405aeeff00b08c5ee7c37b88

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-06-24T07:14:14.539Z

Updated: 2026-06-28T06:36:36.561Z

Reserved: 2026-06-09T07:44:35.367Z

Link: CVE-2026-52918

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Moderate

Publid Date: 2026-06-24T00:00:00Z

Links: CVE-2026-52918 - Bugzilla

OpenCVE Enrichment

Updated: 2026-06-28T14:00:21Z

Weaknesses

CWE-820

Tracking

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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