Description
In the Linux kernel, the following vulnerability has been resolved: tpm: fix off-by-four bounds check in tpm2_get_random() When the response carries the TPM2_ST_SESSIONS tag, tpm2_get_random() skips the 4-byte parameter size field before locating the random data, but the bounds check still validates the response length against TPM_HEADER_SIZE. A truncated response can pass the check and make memcpy() read up to 4 bytes past the response end, so stale buffer contents end up in the caller's random bytes. Fix this by checking the response length against 'offset', which already includes the skipped parameter size field.
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
1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 to < be54101992c2c5218be0e0a87827ccc96e3089afaffected1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 to < e30a2406408d2df6d9cd48c2e59e913cf266a05aaffected1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 to < 42bb6216b861e892512128219ff23010d656ba14affected1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 to < 9b522400bf5c082feb9a0037a053ea822a2c7e4daffected
Linux Linux
Default version status: affected
6.10affected0 to < 6.10unaffected6.12.113 to ≤ 6.12.*unaffected6.18.56 to ≤ 6.18.*unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected