#VU89673 NULL pointer dereference in Linux kernel - CVE-2024-27399

Vulnerability identifier: #VU89673

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-27399

CWE-ID: CWE-476

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dreference error within the l2cap_chan_timeout() function in net/bluetooth/l2cap_core.c. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/adf0398cee86643b8eacde95f17d073d022f782c
https://git.kernel.org/stable/c/e137e2ba96e51902dc2878131823a96bf8e638ae
https://git.kernel.org/stable/c/6466ee65e5b27161c846c73ef407f49dfa1bd1d9
https://git.kernel.org/stable/c/06acb75e7ed600d0bbf7bff5628aa8f24a97978c
https://git.kernel.org/stable/c/e97e16433eb4533083b096a3824b93a5ca3aee79
https://git.kernel.org/stable/c/8960ff650aec70485b40771cd8e6e8c4cb467d33
https://git.kernel.org/stable/c/955b5b6c54d95b5e7444dfc81c95c8e013f27ac0
https://git.kernel.org/stable/c/eb86f955488c39526534211f2610e48a5cf8ead4

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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