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CVE-2026-46283

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: tpm: Use kfree_sensitive() to free auth session in tpm_dev_release() tpm_dev_release() uses plain kfree() to free chip->auth, w…

Published Jun 8, 2026EPSS 0.16%

Overview

CVE-2026-46283 is a medium-severity vulnerability. It was published on June 8, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()

tpm_dev_release() uses plain kfree() to free chip->auth, which contains

sensitive cryptographic material including HMAC session keys, nonces,

and passphrase data (struct tpm2_auth).

Every other code path that frees this structure uses kfree_sensitive()

to zero the memory before releasing it: both tpm2_end_auth_session()

and tpm_buf_check_hmac_response() do so. The tpm_dev_release() path

is the only one that does not, leaving key material in freed slab

memory until it is eventually overwritten.

Use kfree_sensitive() for consistency with the rest of the driver and

to ensure session keys are scrubbed during device teardown.

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

Refgit.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7Refgit.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352Refgit.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2Refgit.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46283?

CVE-2026-46283 is a medium-severity vulnerability. It was published on June 8, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-46283?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46283?

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.

How can CyberStrike help with CVE-2026-46283?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46283 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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