CVE-2026-98728
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.
How to fix
- Linux Linuxbe54101992c2c5218be0e0a87827ccc96e3089af, e30a2406408d2df6d9cd48c2e59e913cf266a05a, 42bb6216b861e892512128219ff23010d656ba14, 9b522400bf5c082feb9a0037a053ea822a2c7e4d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 ≤ v < be54101992c2c5218be0e0a87827ccc96e3089af, 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 ≤ v < e30a2406408d2df6d9cd48c2e59e913cf266a05a, 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 ≤ v < 42bb6216b861e892512128219ff23010d656ba14, 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 ≤ v < 9b522400bf5c082feb9a0037a053ea822a2c7e4d, 6.10 | be54101992c2c5218be0e0a87827ccc96e3089af, e30a2406408d2df6d9cd48c2e59e913cf266a05a, 42bb6216b861e892512128219ff23010d656ba14, 9b522400bf5c082feb9a0037a053ea822a2c7e4d |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.