Buffer overflow in Linux kernel - CVE-2025-39836
Published: September 17, 2025
Vulnerability identifier: #VU115704
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-39836
CWE-ID: CWE-119
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 perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the mm_communicate(), setup_mm_hdr(), get_max_payload(), get_property_int(), tee_get_variable(), tee_get_next_variable(), tee_set_variable() and tee_query_variable_info() functions in drivers/firmware/efi/stmm/tee_stmm_efi.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-39836
Install update from vendor's repository.