SB2025102331 - Use-after-free in Linux kernel ext4
Published: October 23, 2025 Updated: October 26, 2025
Security Bulletin ID
SB2025102331
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2023-53692)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ext4_clu_mapped() function in fs/ext4/extents.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/11c87c8df2cae1d6be83c07e59fef0792de73482
- https://git.kernel.org/stable/c/14da044725a3ab10affa3566d29c15737c0e67a4
- https://git.kernel.org/stable/c/40566def189c513be2c694681256d7486cc6e368
- https://git.kernel.org/stable/c/770b0613637f59f3091dda1ff0c23671a5326b9c
- https://git.kernel.org/stable/c/835659598c67907b98cd2aa57bb951dfaf675c69
- https://git.kernel.org/stable/c/96d440bee177669dc0acedca0abd73bae6a9be8b
- https://git.kernel.org/stable/c/a34f6dcb78c654ab905642c1b4e7e5fbb4f0babe
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.243