5.5

CVE-2024-53085

tpm: Lock TPM chip in tpm_pm_suspend() first

In the Linux kernel, the following vulnerability has been resolved:

tpm: Lock TPM chip in tpm_pm_suspend() first

Setting TPM_CHIP_FLAG_SUSPENDED in the end of tpm_pm_suspend() can be racy
according, as this leaves window for tpm_hwrng_read() to be called while
the operation is in progress. The recent bug report gives also evidence of
this behaviour.

Aadress this by locking the TPM chip before checking any chip->flags both
in tpm_pm_suspend() and tpm_hwrng_read(). Move TPM_CHIP_FLAG_SUSPENDED
check inside tpm_get_random() so that it will be always checked only when
the lock is reserved.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.4 < 6.11.8
Linux ≫ Linux Kernel Version6.12 Updaterc1
Linux ≫ Linux Kernel Version6.12 Updaterc2
Linux ≫ Linux Kernel Version6.12 Updaterc3
Linux ≫ Linux Kernel Version6.12 Updaterc4
Linux ≫ Linux Kernel Version6.12 Updaterc5
Linux ≫ Linux Kernel Version6.12 Updaterc6
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.067
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

https://git.kernel.org/stable/c/9265fed6db601ee2ec47577815387458ef4f047a
Patch
https://git.kernel.org/stable/c/bc203fe416abdd1c29da594565a7c3c4e979488e
Patch
https://git.kernel.org/stable/c/cfaf83501a0cbb104499c5b0892ee5ebde4e967f