CVE-2022-49286
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:…
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/476ddd23f818fb94cf86fb5617f3bb9a7c92113dPatch
- https://git.kernel.org/stable/c/5b1d2561a03e534064b51c50c774657833d3d2cfPatch
- https://git.kernel.org/stable/c/95193d12f10a8a088843b25e0f5fe1d83ec6b079Patch
- https://git.kernel.org/stable/c/ba84f9a48366dcc3cdef978599433efe101dd5bdPatch
- https://git.kernel.org/stable/c/eda1662cce964c8a65bb86321f8d9cfa6e9ceaabPatch
- https://git.kernel.org/stable/c/fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.