Denial of service in Linux kernel bpf

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU93428

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-35894

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper access restrictions in mptcp_set_rcvlowat() function in net/mptcp/sockopt.c, which allow bpf accessing mptcp-level proto_ops from a tcp subflow scope. A local user can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/3ffb1ab698376f09cc33101c07c1be229389fe29
http://git.kernel.org/stable/c/fcf4692fa39e86a590c14a4af2de704e1d20a3b5

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.