CVE-2026-52918

Bluetooth: serialize accept_q access

State: Published
Severity: 8.8 High
Published: Jun 24, 2026
Updated: Oct 19, 2026
Reserved: Jun 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d9ce4de05df2385c19e2c7d12f529144e1a44af1Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 41c8c1c7923e86e0eb59cfb4279349112756a336Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4ec17782fd186f901a7329605d11048b085b945aAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before be43e6b4043113c3b3cf887c3c8350f67140274cAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 85f8674cae82053f1e6bab295f6a8422cca14db5Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8b4c412e001b0c670eb937beab491af974da55b3Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a218bf69eb51fefe59a3976fa8925261141f681cAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e83f5e24da741fa9405aeeff00b08c5ee7c37b88Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.259 through 5.10.Not affected 5.15.210 through 5.15.Not affected 6.1.176 through 6.1.Not affected 6.6.142 through 6.6.Not affected 6.12.92 through 6.12.Not affected 6.18.34 through 6.18.Not affected 7.0.11 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d9ce4de05df2385c19e2c7d12f529144e1a44af1Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 41c8c1c7923e86e0eb59cfb4279349112756a336Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4ec17782fd186f901a7329605d11048b085b945aAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before be43e6b4043113c3b3cf887c3c8350f67140274cAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 85f8674cae82053f1e6bab295f6a8422cca14db5Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8b4c412e001b0c670eb937beab491af974da55b3Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a218bf69eb51fefe59a3976fa8925261141f681cAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e83f5e24da741fa9405aeeff00b08c5ee7c37b88Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.259 through 5.10.*Not affected
5.15.210 through 5.15.*Not affected
6.1.176 through 6.1.*Not affected
6.6.142 through 6.6.*Not affected
6.12.92 through 6.12.*Not affected
6.18.34 through 6.18.*Not affected
7.0.11 through 7.0.*Not affected
7.1 and laterNot affected

References

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