SB20251001127 - Buffer overflow in Linux kernel ext4
Published: October 1, 2025 Updated: October 27, 2025
Security Bulletin ID
SB20251001127
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2023-53503)
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.
Remediation
Install update from vendor's website.
References
- 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