CVE-2026-46283 (GCVE-0-2026-46283)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:41 – Updated: 2026-06-14 18:06
VLAI
Title
tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < dd3ac52ea7a001406c7dbc663aae4b9f89da679a (git)
Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < 53e6d2d834df40960b655b353e7a8ff4d927e1c7 (git)
Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < 84ced03172da544c9f8c0862faad48104f519352 (git)
Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < c424d2664f08c77f08b4580b5f0cbaabf7c229b2 (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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      "product_status:known_affected": "90",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46283.json",
      "version": "3"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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