Sensitive Information in Resource Not Removed Before Reuse in Linux kernel - CVE-2026-46283

Vulnerability identifier: #VU134249

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-46283

CWE-ID: CWE-226

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to missing sensitive data clearing in tpm_dev_release() when releasing a TPM device. A local user can trigger device teardown to disclose sensitive information.

The freed structure may contain HMAC session keys, nonces, and passphrase data.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-realtime (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-ibm (Ubuntu package)
linux-azure-fde (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-27.27
linux-realtime (Ubuntu package) - update to 7.0.0-27.27.1
linux-gcp (Ubuntu package) - update to 7.0.0-1007.7
linux-oracle (Ubuntu package) - update to 7.0.0-1007.7
linux-aws (Ubuntu package) - update to 7.0.0-1008.8
linux-raspi (Ubuntu package) - update to 7.0.0-1014.14
linux-azure (Ubuntu package) - update to 7.0.0-1010.10
linux-nvidia (Ubuntu package) - update to 7.0.0-1013.13
linux-ibm (Ubuntu package) - update to 7.0.0-1009.9
linux-azure-fde (Ubuntu package) - update to 7.0.0-1009.9

• https://git.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7
• https://git.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352
• https://git.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2
• https://git.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a

• Sensitive Information in Resource Not Removed Before Reuse in Linux kernel char tpm driver
• Ubuntu update for linux
• Ubuntu update for linux-raspi
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure