CVE-2025-68792

Summary

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

tpm2-sessions: Fix out of range indexing in name_size

'name_size' does not have any range checks, and it just directly indexes with TPM_ALG_ID, which could lead into memory corruption at worst.

Address the issue by only processing known values and returning -EINVAL for unrecognized values.

Make also 'tpm_buf_append_name' and 'tpm_buf_fill_hmac_session' fallible so that errors are detected before causing any spurious TPM traffic.

End also the authorization session on failure in both of the functions, as the session state would be then by definition corrupted.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1085b8276bb4239daa7008f0dcd5c973e4bd690f < 47e676ce4d68f461dfcab906f6aeb254f7276debaffected
LinuxLinux1085b8276bb4239daa7008f0dcd5c973e4bd690f < 04a3aa6e8c5f878cc51a8a1c90b6d3c54079bc43affected
LinuxLinux1085b8276bb4239daa7008f0dcd5c973e4bd690f < 6e9722e9a7bfe1bbad649937c811076acf86e1fdaffected
LinuxLinux6.10affected
LinuxLinux0 < 6.10unaffected
LinuxLinux6.12.66 <= 6.12.*unaffected
LinuxLinux6.18.3 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References