SB2026052791 - Memory leak in Linux kernel char tpm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-46096)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a memory leak in tpm2_read_public() when processing TPM2 public data. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs because allocated buffer memory is not released on certain exit paths, including a successful return and an error return after an unrecognized hash algorithm.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2f434be87e256fd58254f60ddf5d7d58e775ca0b
• https://git.kernel.org/stable/c/f0f75a3d98b7959a8677b6363e23190f3018636b
• https://git.kernel.org/stable/c/f8775d9d9062da662cc861f9ff7722a65896d4cd