SB20251226140 - Use-after-free in Linux kernel ext4
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226140
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-2022-50730)
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_evict_inode() function in fs/ext4/inode.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0d041b7251c13679a0f6c7926751ce1d8a7237c1
- https://git.kernel.org/stable/c/3b893cc9a8d8b4e486a6639f5e107b56b7197d2e
- https://git.kernel.org/stable/c/b085fb43feede48ebf80ab7e2dd150c8d9902932
- https://git.kernel.org/stable/c/bc12ac98ea2e1b70adc6478c8b473a0003b659d3
- https://git.kernel.org/stable/c/bdc698ce91f232fd5eb11d2373e9f82f687314b8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.163