A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-2941-1 linux-4.19 security update
Debian DSA Debian DSA DSA-5096-1 linux security update
Ubuntu USN Ubuntu USN USN-5278-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5337-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5338-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5339-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5368-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5377-1 Linux kernel (BlueField) vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00283}

epss

{'score': 0.00225}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T04:32:12.309Z

Reserved: 2021-12-08T00:00:00

Link: CVE-2021-44733

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-12-22T17:15:09.123

Modified: 2024-11-21T06:31:28.540

Link: CVE-2021-44733

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-12-14T12:00:00Z

Links: CVE-2021-44733 - Bugzilla

cve-icon OpenCVE Enrichment

No data.