CVE-2021-46922

KEYS: trusted: Fix TPM reservation for seal/unseal

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Feb 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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()

Affected products

Linux · Linux

References

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