CVE-2024-53085 tpm: Lock TPM chip in tpm_pm_suspend() first

What is CVE-2024-53085?

CVE-2024-53085 is a medium-severity vulnerability in Linux kernel, published on 19 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

tpm: Lock TPM chip in tpm_pm_suspend() first

Setting TPM_CHIP_FLAG_SUSPENDED in the end of tpm_pm_suspend() can be racy according, as this leaves window for tpm_hwrng_read() to be called while the operation is in progress. The recent bug report gives also evidence of this behaviour.

Aadress this by locking the TPM chip before checking any chip->flags both in tpm_pm_suspend() and tpm_hwrng_read(). Move TPM_CHIP_FLAG_SUSPENDED check inside tpm_get_random() so that it will be always checked only when the lock is reserved.

Weakness: CWE-667

Which versions are affected by CVE-2024-53085?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-53085?

Apply the vendor's patch.

Is CVE-2024-53085 being exploited?

There is no known exploitation of CVE-2024-53085 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-53849, BELL-CVE-2024-53085, DEBIAN-CVE-2024-53085, GHSA-8vv8-fmp2-x4c4, ROOT-OS-DEBIAN-12-CVE-2024-53085, UBUNTU-CVE-2024-53085.