High 8.8Published Jun 24, 2026

CVE-2026-52918Bluetooth: serialize accept_q access

Updated under an hour ago (Oct 27, 2026, 10:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d9ce4de05df2385c19e2c7d12f529144e1a44af1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 41c8c1c7923e86e0eb59cfb4279349112756a336; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4ec17782fd186f901a7329605d11048b085b945a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before be43e6b4043113c3b3cf887c3c8350f67140274c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 85f8674cae82053f1e6bab295f6a8422cca14db5; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8b4c412e001b0c670eb937beab491af974da55b3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a218bf69eb51fefe59a3976fa8925261141f681c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e83f5e24da741fa9405aeeff00b08c5ee7c37b88	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 2.6.12.1 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 2.6.12; and 8 more ranges	NVD

References

References

https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1	patch
https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336	patch
https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a	patch
https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c	patch
https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5	patch
https://git.kernel.org/stable/c/8b4c412e001b0c670eb937beab491af974da55b3	patch
https://git.kernel.org/stable/c/a218bf69eb51fefe59a3976fa8925261141f681c	patch
https://git.kernel.org/stable/c/e83f5e24da741fa9405aeeff00b08c5ee7c37b88	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.