CVE-2026-98728

/// Technical 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References