KEYS: trusted: Fix TPM reservation for seal/unseal

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Summary

CVECVE-2021-46922
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-02-27 10:15:07 UTC
Updated2026-08-04 10:16:36 UTC
DescriptionIn 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()

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 67118bb78d72aab5b831f054a74ae856339a1974 bf84ef2dd2ccdcd8f2658476d34b51455f970ce4 git Not specified
CNA Linux Linux affected 498b8fc1cdc13b57b02dd28544b18323900fae10 39c8d760d44cb3fa0d67e8cd505df81cf4d80999 git Not specified
CNA Linux Linux affected 8c657a0590de585b1115847c17b34a58025f2f4b 9d5171eab462a63e2fbebfccf6026e92be018f20 git Not specified
CNA Linux Linux affected 5.10.20 5.10.33 semver Not specified
CNA Linux Linux affected 5.11.3 5.11.17 semver Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bf84ef2dd2ccdcd8f2658476d34b51455f970ce4 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/9d5171eab462a63e2fbebfccf6026e92be018f20 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/39c8d760d44cb3fa0d67e8cd505df81cf4d80999 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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