NULL pointer dereference in Linux kernel smb server

1) NULL pointer dereference

EUVDB-ID: #VU97527

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-46742

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 parse_durable_handle_context() and smb2_open() functions in fs/smb/server/smb2pdu.c, within the create_lease_buf() function in fs/smb/server/oplock.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

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/07f384c5be1f8633b13f0a22616e227570450bc6
https://git.kernel.org/stable/c/3b692794b81f2ecad69a4adbba687f3836824ada
https://git.kernel.org/stable/c/4e8771a3666c8f216eefd6bd2fd50121c6c437db

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.