CVE-2022-49286: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tpm: use try_get_ops() in tpm-space.c As part of the series conversion to remove nested TPM operations: https://lore.kernel.org/all/20190205224723.19671-1-jarkko.sakkinen@linux.intel.com/ exposure of the chip->tpm_mutex was removed from much of the upper level code. In this conversion, tpm2_del_space() was missed. This didn't matter much because it's usually called closely after a converted operation, so there's only a very tiny race window where the chip can be removed before the space flushing is done which causes a NULL deref on the mutex. However, there are reports of this window being hit in practice, so fix this by converting tpm2_del_space() to use tpm_try_get_ops(), which performs all the teardown checks before acquring the mutex.

Affected products

• Linux Linux Kernel: from 4.12, before 5.4.188 (fixed in 5.4.188); from 5.5, before 5.10.109 (fixed in 5.10.109); from 5.11, before 5.15.32 (fixed in 5.15.32); from 5.16, before 5.16.18 (fixed in 5.16.18); version 5.17 only

Published 2025-02-26. Last modified 2026-08-13.