Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 before dd3ac52ea7a001406c7dbc663aae4b9f89da679a; affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 before 53e6d2d834df40960b655b353e7a8ff4d927e1c7; affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 before 84ced03172da544c9f8c0862faad48104f519352; affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 before c424d2664f08c77f08b4580b5f0cbaabf7c229b2 |
| Linux / Linux | affected 6.10; unaffected 0 before 6.10; unaffected 6.12.86 through 6.12.*; unaffected 6.18.27 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.