#VU114271 NULL pointer dereference in Linux kernel - CVE-2025-38562
Published: August 20, 2025 / Updated: September 25, 2025
Vulnerability identifier: #VU114271
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-38562
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the krb5_authenticate() function in fs/smb/server/smb2pdu.c. A remote user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353
- https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e
- https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653
- https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de
- https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb
- https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57
- https://www.zerodayinitiative.com/advisories/ZDI-25-917/