CVE-2021-46922

KEYS: trusted: Fix TPM reservation for seal/unseal

Description

In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix TPM reservation for seal/unseal The original patch 8c657a0590de ("KEYS: trusted: Reserve TPM for seal and 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() in tpm2_seal_trusted() got lost. This causes an imbalanced put of the TPM ops and causes oopses on TIS based hardware. This fix puts back the lost tpm_try_get_ops()

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/bf84ef2dd2ccdcd8f2658476d34b51455f970ce4	patch
https://git.kernel.org/stable/c/39c8d760d44cb3fa0d67e8cd505df81cf4d80999	patch
https://git.kernel.org/stable/c/9d5171eab462a63e2fbebfccf6026e92be018f20	patch

Frequently Asked Questions

What is the severity of CVE-2021-46922?: CVE-2021-46922 has been scored as a medium severity vulnerability.
How to fix CVE-2021-46922?: To fix CVE-2021-46922, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-46922 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-46922 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-46922?: CVE-2021-46922 affects Linux Linux, Linux Linux.

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