SB2025082847 - Use-after-free in Linux kernel f2fs
Published: August 28, 2025
Security Bulletin ID
SB2025082847
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-2025-38627)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the lzo_decompress_pages(), lz4_decompress_pages(), zstd_init_decompress_ctx(), zstd_decompress_pages(), f2fs_release_decomp_mem(), f2fs_end_read_compressed_page(), allow_memalloc_for_decomp(), f2fs_prepare_decomp_mem(), f2fs_alloc_dic(), f2fs_free_dic() and f2fs_put_dic() functions in fs/f2fs/compress.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.