Use-after-free in Linux kernel - CVE-2025-39983

Vulnerability identifier: #VU117258

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-39983

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hci_num_comp_pkts_evt() function in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.

Linux kernel
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel (Red Hat package)
OpenShift Virtualization

Install update from vendor's repository.

OpenShift Virtualization - update to 4.19.17
kernel (Red Hat package) - addressed in versions 5.14.0-570.77.1.el9_6, 5.14.0-611.8.1.el9_7, 6.12.0-55.52.1.el10_0, 6.12.0-124.20.1.el10_1

• https://git.kernel.org/stable/c/2e128683176a56459cef8705fc7c35f438f88abd
• https://git.kernel.org/stable/c/dde33124f17cf3bab4dc5e18d1b4dee128361061

• Use-after-free in Linux kernel bluetooth
• Red Hat Enterprise Linux 9 update for kernel
• Red Hat Enterprise Linux 10 update for kernel
• Red Hat Enterprise Linux 10 update for kernel
• Red Hat Enterprise Linux 9 update for kernel
• Multiple vulnerabilities in OpenShift Virtualization 4.19