CVE-2026-46283tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 26 days later
· 26 days later
Published
- 6 days later
· 6 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 – < dd3ac52ea7a001406c7dbc663aae4b9f89da679a
- affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 – < 53e6d2d834df40960b655b353e7a8ff4d927e1c7
- affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 – < 84ced03172da544c9f8c0862faad48104f519352
- affected 699e3efd6c645c741ea4d6d58282c56b6d108cf7 – < c424d2664f08c77f08b4580b5f0cbaabf7c229b2
- affected 6.10
- unaffected < 6.10
- unaffected 6.12.86 – ≤ 6.12.*
- unaffected 6.18.27 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References4
- https://git.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a (opens in a new tab)
- https://git.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7 (opens in a new tab)
- https://git.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352 (opens in a new tab)
- https://git.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-35148 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46283)Record last updated .