SB20260626128 - Memory leak in Linux kernel tee driver

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-53210)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a memory leak in register_shm_helper() in the tee shared memory registration handler when processing a TEE_IOC_SHM_REGISTER request with a zero length. A local user can send a crafted ioctl request to cause a denial of service.

The issue is triggered when struct tee_ioctl_shm_register_data specifies a length of 0.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/26682f5efc276e3ad96d102019472bfbf03833b2
• https://git.kernel.org/stable/c/4277759906b44d923a38c8f59f5576501b187b0d
• https://git.kernel.org/stable/c/c10c9c48b2903f41ed4c532043b0576e86228236
• https://git.kernel.org/stable/c/dbf779db927414f5b37c1f666013e9b48a88cfde