Vulnerability-Lookup

GHSA-C745-G7J9-CPW5

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-06-08 18:31

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-46283"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T17:16:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: Use kfree_sensitive() to free auth session in tpm_dev_release()\n\ntpm_dev_release() uses plain kfree() to free chip-\u003eauth, which contains\nsensitive cryptographic material including HMAC session keys, nonces,\nand passphrase data (struct tpm2_auth).\n\nEvery other code path that frees this structure uses kfree_sensitive()\nto zero the memory before releasing it: both tpm2_end_auth_session()\nand tpm_buf_check_hmac_response() do so. The tpm_dev_release() path\nis the only one that does not, leaving key material in freed slab\nmemory until it is eventually overwritten.\n\nUse kfree_sensitive() for consistency with the rest of the driver and\nto ensure session keys are scrubbed during device teardown.",
  "id": "GHSA-c745-g7j9-cpw5",
  "modified": "2026-06-08T18:31:52Z",
  "published": "2026-06-08T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46283"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-06-08 15:41 – Updated: 2026-06-14 18:06

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

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/dd3ac52ea7a001406…
https://git.kernel.org/stable/c/53e6d2d834df40960…
https://git.kernel.org/stable/c/84ced03172da544c9…
https://git.kernel.org/stable/c/c424d2664f08c77f0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < dd3ac52ea7a001406c7dbc663aae4b9f89da679a (git) Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < 53e6d2d834df40960b655b353e7a8ff4d927e1c7 (git) Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < 84ced03172da544c9f8c0862faad48104f519352 (git) Affected: 699e3efd6c645c741ea4d6d58282c56b6d108cf7 , < c424d2664f08c77f08b4580b5f0cbaabf7c229b2 (git)
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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/tpm/tpm-chip.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dd3ac52ea7a001406c7dbc663aae4b9f89da679a",
              "status": "affected",
              "version": "699e3efd6c645c741ea4d6d58282c56b6d108cf7",
              "versionType": "git"
            },
            {
              "lessThan": "53e6d2d834df40960b655b353e7a8ff4d927e1c7",
              "status": "affected",
              "version": "699e3efd6c645c741ea4d6d58282c56b6d108cf7",
              "versionType": "git"
            },
            {
              "lessThan": "84ced03172da544c9f8c0862faad48104f519352",
              "status": "affected",
              "version": "699e3efd6c645c741ea4d6d58282c56b6d108cf7",
              "versionType": "git"
            },
            {
              "lessThan": "c424d2664f08c77f08b4580b5f0cbaabf7c229b2",
              "status": "affected",
              "version": "699e3efd6c645c741ea4d6d58282c56b6d108cf7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/tpm/tpm-chip.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: Use kfree_sensitive() to free auth session in tpm_dev_release()\n\ntpm_dev_release() uses plain kfree() to free chip-\u003eauth, which contains\nsensitive cryptographic material including HMAC session keys, nonces,\nand passphrase data (struct tpm2_auth).\n\nEvery other code path that frees this structure uses kfree_sensitive()\nto zero the memory before releasing it: both tpm2_end_auth_session()\nand tpm_buf_check_hmac_response() do so. The tpm_dev_release() path\nis the only one that does not, leaving key material in freed slab\nmemory until it is eventually overwritten.\n\nUse kfree_sensitive() for consistency with the rest of the driver and\nto ensure session keys are scrubbed during device teardown."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:06:13.398Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a"
        },
        {
          "url": "https://git.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352"
        },
        {
          "url": "https://git.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2"
        }
      ],
      "title": "tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46283",
    "datePublished": "2026-06-08T15:41:26.425Z",
    "dateReserved": "2026-05-13T15:03:33.110Z",
    "dateUpdated": "2026-06-14T18:06:13.398Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-C745-G7J9-CPW5

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

Tags

Sightings

Nomenclature