CVEs-PoC/2021/CVE-2021-46922.md

### [CVE-2021-46922](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46922)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=67118bb78d72%3C%20bf84ef2dd2cc%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In the Linux kernel, the following vulnerability has been resolved:KEYS: trusted: Fix TPM reservation for seal/unsealThe original patch 8c657a0590de ("KEYS: trusted: Reserve TPM for sealand unseal operations") was correct on the mailing list:https://lore.kernel.org/linux-integrity/20210128235621.127925-4-jarkko@kernel.org/But somehow got rebased so that the tpm_try_get_ops() intpm2_seal_trusted() got lost.  This causes an imbalanced put of theTPM ops and causes oopses on TIS based hardware.This fix puts back the lost tpm_try_get_ops()

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds