NULL pointer dereference in Linux kernel riscv net

1) NULL pointer dereference

EUVDB-ID: #VU91225

Risk: Low

CVSSv3.1: 4.8 [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-2021-47486

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference within the bpf_int_jit_compile() function in arch/riscv/net/bpf_jit_core.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/cac6b043cea3e120f4fccec16f7381747cbfdc0d
http://git.kernel.org/stable/c/e1b80a5ebe5431caeb20f88c32d4a024777a2d41
http://git.kernel.org/stable/c/27de809a3d83a6199664479ebb19712533d6fd9b

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.