Description
In the Linux kernel, the following vulnerability has been resolved: tpm: Use kfree_sensitive() to free auth session in tpm_dev_release() tpm_dev_release() uses plain kfree() to free chip->auth, which contains sensitive cryptographic material including HMAC session keys, nonces, and passphrase data (struct tpm2_auth). Every other code path that frees this structure uses kfree_sensitive() to zero the memory before releasing it: both tpm2_end_auth_session() and tpm_buf_check_hmac_response() do so. The tpm_dev_release() path is the only one that does not, leaving key material in freed slab memory until it is eventually overwritten. Use kfree_sensitive() for consistency with the rest of the driver and to ensure session keys are scrubbed during device teardown.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
699e3efd6c645c741ea4d6d58282c56b6d108cf7 to < dd3ac52ea7a001406c7dbc663aae4b9f89da679aaffected699e3efd6c645c741ea4d6d58282c56b6d108cf7 to < 53e6d2d834df40960b655b353e7a8ff4d927e1c7affected699e3efd6c645c741ea4d6d58282c56b6d108cf7 to < 84ced03172da544c9f8c0862faad48104f519352affected699e3efd6c645c741ea4d6d58282c56b6d108cf7 to < c424d2664f08c77f08b4580b5f0cbaabf7c229b2affected
Linux Linux
Default version status: affected
6.10affected0 to < 6.10unaffected6.12.86 to ≤ 6.12.*unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected