#VU116772 NULL pointer dereference in Linux kernel - CVE-2023-53681
Published: October 8, 2025 / Updated: October 26, 2025
Vulnerability identifier: #VU116772
Vulnerability risk: Low
CVSSv4.0: 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-2023-53681
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
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 __bch_btree_node_alloc() function in drivers/md/bcache/btree.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4
- https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4
- https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f
- https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4
- https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944
- https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198
- https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.121