Use-after-free in Linux kernel - CVE-2025-38627
Published: August 28, 2025
Vulnerability identifier: #VU114498
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-38627
CWE-ID: CWE-416
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 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.
How to mitigate CVE-2025-38627
Install update from vendor's repository.