CVE-2026-99097
kernel: tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 26, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Trusted Execution Environment (TEE) subsystem. A local user can cause a Denial of Service (DoS) by requesting a zero-sized shared memory allocation. Because the subsystem fails to validate the requested allocation size before calculating page counts, the kernel's memory allocator encounters an invalid request, triggering a warning or crashing systems configured to panic on warnings.
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-617 · Reachable Assertion