What is CVE-2021-46922?

CVE-2021-46922 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2024-02-27.

How severe is CVE-2021-46922?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2021-46922 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux

CVE-2021-46922

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()

EPSS: 0.002 (14.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 67118bb78d72aab5b831f054a74ae856339a1974, 498b8fc1cdc13b57b02dd28544b18323900fae10, 8c657a0590de585b1115847c17b34a58025f2f4b
Linux Linux_kernel

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-46922?: CVE-2021-46922 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2024-02-27.
How severe is CVE-2021-46922?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-46922 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.