Vulnerabilities > CVE-2021-46922 - Unspecified vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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()
Vulnerable Configurations
References
- https://git.kernel.org/stable/c/39c8d760d44cb3fa0d67e8cd505df81cf4d80999
- https://git.kernel.org/stable/c/39c8d760d44cb3fa0d67e8cd505df81cf4d80999
- https://git.kernel.org/stable/c/9d5171eab462a63e2fbebfccf6026e92be018f20
- https://git.kernel.org/stable/c/9d5171eab462a63e2fbebfccf6026e92be018f20
- https://git.kernel.org/stable/c/bf84ef2dd2ccdcd8f2658476d34b51455f970ce4
- https://git.kernel.org/stable/c/bf84ef2dd2ccdcd8f2658476d34b51455f970ce4