KEYS: trusted: Fix TPM reservation for seal/unseal (CVE-2021-46922) | HOL Guard CVE

High · CVSS 7.8CVE-2021-46922

KEYS: trusted: Fix TPM reservation for seal/unseal

Answer in brief

CVE-2021-46922 records a High severity (CVSS 7.8) vulnerability in KEYS: trusted: Fix TPM reservation for seal/unseal. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 27, 2024Updated Aug 5, 2026Source checked Sep 19, 2026First seen by HOL Aug 4, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=67118bb78d72aab5b831f054a74ae856339a1974 <bf84ef2dd2ccdcd8f2658476d34b51455f970ce4 \|\| >=498b8fc1cdc13b57b02dd28544b18323900fae10 <39c8d760d44cb3fa0d67e8cd505df81cf4d80999 \|\| >=8c657a0590de585b1115847c17b34a58025f2f4b <9d5171eab462a63e2fbebfccf6026e92be018f20	bf84ef2dd2ccdcd8f2658476d34b51455f970ce4, 39c8d760d44cb3fa0d67e8cd505df81cf4d80999, 9d5171eab462a63e2fbebfccf6026e92be018f20
Linux/Linuxgeneric	>=5.10.20 <5.10.33 \|\| >=5.11.3 <5.11.17	5.10.33, 5.11.17

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to bf84ef2dd2ccdcd8f2658476d34b51455f970ce4; Linux/Linux to 5.10.33 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 27, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source 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/[email protected]/ 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()

Quoted source text, attributed separately from HOL analysis.