Use-after-free in Linux kernel bluetooth rfcomm

1) Use-after-free

EUVDB-ID: #VU102019

Risk: Low

CVSSv4.0: 5.9 [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/E:U/U:Clear]

CVE-ID: CVE-2024-56604

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.1.119

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.6:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/32df687e129ef0f9afcbcc914f7c32deb28fd481
https://git.kernel.org/stable/c/3945c799f12b8d1f49a3b48369ca494d981ac465
https://git.kernel.org/stable/c/6021ccc2471b7b95e29b7cfc7938e042bf56e281
https://git.kernel.org/stable/c/ac3eaac4cf142a15fe67be747a682b1416efeb6e
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.120

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.