What’s Vulnerable › Vulnerabilities

CVE-2023-53305: Bluetooth: L2CAP: Fix use-after-free

• 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: 2025-09-16 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free Fix potential use-after-free in l2cap_le_command_rej.

Affected products

• Linux kernel: before 4.14.324; from 4.15 before 4.19.293; from 4.20 before 5.4.255; from 5.5 before 5.10.192; from 5.11 before 5.15.128; from 5.16 before 6.1.47 — fixed in 4.14.324, 4.19.293, 5.10.192, 5.15.128, 5.4.255, 6.1.47

How to fix

Upgrade to a fixed version: Linux kernel 4.14.324, 4.19.293, 5.10.192, 5.15.128. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/149daab45922ab1ac7f0cbeacab7251a46bf5e63
• https://git.kernel.org/stable/c/1a40c56e8bff3e424724d78a9a6b3272dd8a371d
• https://git.kernel.org/stable/c/255be68150291440657b2cdb09420b69441af3d8
• https://git.kernel.org/stable/c/2958cf9f805b9f0bdc4a761bf6ea281eb8d44f8e
• https://git.kernel.org/stable/c/548a6b64b3c0688f01119a6fcccceb41f8c984e4
• https://git.kernel.org/stable/c/e76bab1b7afa580cd76362540fc37551ada4359b
• https://git.kernel.org/stable/c/f752a0b334bb95fe9b42ecb511e0864e2768046f
• https://git.kernel.org/stable/c/fe49aa73cca6608714477b74bfc6874b9db979df

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