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.
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Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2021-12-23. NVD baseline CVSS 7.0; sources differ by 0.0.
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.
December 22, 2021
November 21, 2024
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | linux-buildinfo-5.14.0-1022-oem (5.14.0-1022.24) @ focal | 2026-05-26 | ubuntu |
| ubuntu | linux-image-unsigned-5.13.0-37-lowlatency (5.13.0-37.42) @ impish | 2026-05-26 | ubuntu |
| ubuntu | linux-headers-azure-fde (5.4.0.1073.76+cvm1.19) @ focal | 2026-05-26 | ubuntu |
| ubuntu | linux-signed-image-lowlatency-hwe-16.04-edge (4.15.0.173.162) @ bionic | 2026-05-26 | ubuntu |
| ubuntu | linux-tools-5.13.0-1021-azure (5.13.0-1021.24~20.04.1) @ focal | 2026-05-26 | ubuntu |
| ubuntu | linux-headers-bluefield (5.4.0.1032.33) @ focal | 2026-05-26 | ubuntu |
| redhat | kernel-rt-0:4.18.0-372.9.1.rt7.166.el8 | 2022-05-10 | redhat |
| redhat | kernel-0:4.18.0-372.9.1.el8 | 2022-05-10 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
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.
RHSA-2022:1975 — Moderate
RHSA-2022:1988 — Moderate
Linux kernel (OEM) vulnerabilities
Linux kernel vulnerabilities
Linux kernel vulnerabilities
Linux kernel vulnerabilities
Linux kernel vulnerabilities
Linux kernel (BlueField) vulnerabilities
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Environment with vulnerable kernel for exploitation of the TEE driver (CVE-2021-44733)
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msrc · redhat