CVE-2026-52918

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.

Score

CVSS 3.1 8.8 High

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-06-24

Last modified

2026-10-19

Weaknesses

CWE-362

Affected products

• Linux Kernel (Linux)
• Simatic S7-1500 Tm Mfp - Gnulinux Subsystem (Siemens)

References

• https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1
• https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336
• https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a
• https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c
• 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/e83f5e24da741fa9405aeeff00b08c5ee7c37b88
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html