NULL pointer dereference in Linux kernel bpf

1) NULL pointer dereference

EUVDB-ID: #VU93047

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-2024-38566

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 real_bind() function in tools/testing/selftests/bpf/progs/lsm_cgroup.c, within the BPF_PROG() function in tools/testing/selftests/bpf/progs/local_storage.c, within the SEC() function in tools/testing/selftests/bpf/progs/bench_local_storage_create.c, within the mark_btf_ld_reg(), check_map_kptr_access(), is_trusted_reg(), bpf_map_direct_read(), BTF_TYPE_SAFE_TRUSTED(), type_is_trusted() and check_ptr_to_btf_access() functions in kernel/bpf/verifier.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/39f8a29330f433000e716eefc4b9abda05b71a82
http://git.kernel.org/stable/c/6f5ae91172a93abac9720ba94edf3ec8f4d7f24f
http://git.kernel.org/stable/c/c58ccdd2483a1d990748cdaf94206b5d5986a001
http://git.kernel.org/stable/c/0db63c0b86e981a1e97d2596d64ceceba1a5470e

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.