Buffer overflow in Linux kernel - CVE-2023-53503
Published: October 1, 2025 / Updated: October 27, 2025
Vulnerability identifier: #VU116307
CSH Severity: Low
CVSS v4.0: 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-2023-53503
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the ext4_mark_group_bitmap_corrupted() function in fs/ext4/super.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-53503
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/100c0ad6c04597fefeaaba2bb1827cc015d95067
- https://git.kernel.org/stable/c/31668cebf45adfb6283e465e641c4f5a21b07afa
- https://git.kernel.org/stable/c/5354b2af34064a4579be8bc0e2f15a7b70f14b5f
- https://git.kernel.org/stable/c/620a3c28221bb219b81bc0bffd065cc187494302
- https://git.kernel.org/stable/c/b4319e457d6e3fb33e443efeaf4634fc36e8a9ed
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.30