CVE-2026-53210
kernel: tee: shm: fix shm leak in register_shm_helper()
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 25, 2026
Updated · July 3, 2026
Description
A flaw was found in the Linux kernel's Trusted Execution Environment (TEE) subsystem. A shared memory (shm) leak occurs in the register_shm_helper() function when TEE_IOC_SHM_REGISTER is called with a zero-length shared memory registration. This can be triggered by a local attacker, potentially leading to a denial of service due to memory exhaustion.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime