What’s Vulnerable › Vulnerabilities

CVE-2023-53386: Bluetooth: Fix potential use-after-free when clear keys

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-18 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix potential use-after-free when clear keys Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu() call.

Affected products

• Linux kernel: from 5.7 before 5.10.195; from 5.11 before 5.15.132; from 5.16 before 6.1.53; from 6.2 before 6.4.16; from 6.5 before 6.5.3 — fixed in 5.10.195, 5.15.132, 6.1.53, 6.4.16, 6.5.3

How to fix

Upgrade to a fixed version: Linux kernel 5.10.195, 5.15.132, 6.1.53, 6.4.16. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/35cc42f04bc49f0656f6840cb7451b3df6049649
• https://git.kernel.org/stable/c/3673952cf0c6cf81b06c66a0b788abeeb02ff3ae
• https://git.kernel.org/stable/c/942d8cefb022f384d5424f8b90c7878f3f93726f
• https://git.kernel.org/stable/c/94617b736c25091b60e514e2e7aeafcbbee6b700
• https://git.kernel.org/stable/c/da19f35868dfbecfff4f81166c054d2656cb1be4
• https://git.kernel.org/stable/c/e87da6a0ac6e631454e7da53a76aa9fe44aaa5dd

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