Linux kernel: trusted_tpm_unseal pcrlock bug masks unseal error
CVE-2026-99221 Published on November 2, 2026
keys/trusted_keys: return immediately after TPM unseal failure
In the Linux kernel, the following vulnerability has been resolved:
keys/trusted_keys: return immediately after TPM unseal failure
trusted_tpm_unseal() proceeds to pcrlock() when the TPM unseal operation
fails. If pcrlock() succeeds, its return value overwrites the unseal error,
causing key instantiation to succeed.
Return immediately when unseal fails to preserve the original error.
Products Associated with CVE-2026-99221
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Affected Versions
Linux:- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below 4876f09ce222e140a73aad950882b3605440c935 is affected.
- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below 2d92a0f87c338a08367aff05edd1ade86da4ac8d is affected.
- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below 234d09bb3b3d84851d4b3246272addc30f3353eb is affected.
- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below 6e359d8cb8580b9874801dea930086effd4d9c62 is affected.
- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below e55d48f21f591a9fe80d26b5fbd1912ea725d9e6 is affected.
- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below 63b19ec2863b2cb5279b746ecd3d6210b1a93945 is affected.
- Version 5d0682be318910e028bdf57c90a1695ffc34be37 and below ed697a5f667435bbb1cedbe5bd9f300de645047d is affected.
- Version 5.13 is affected.
- Before 5.13 is unaffected.
- Version 5.15.224, <= 5.15.* is unaffected.
- Version 6.1.191, <= 6.1.* is unaffected.
- Version 6.6.161, <= 6.6.* is unaffected.
- Version 6.12.115, <= 6.12.* is unaffected.
- Version 6.18.60, <= 6.18.* is unaffected.
- Version 7.2.14, <= 7.2.* is unaffected.
- Version 7.3.1, <= 7.3.* is unaffected.