CVE-2024-49851 tpm: Clean up TPM space after command failure

What is CVE-2024-49851?

CVE-2024-49851 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 Oct 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: Clean up TPM space after command failure

tpm_dev_transmit prepares the TPM space before attempting command transmission. However if the command fails no rollback of this preparation is done. This can result in transient handles being leaked if the device is subsequently closed with no further commands performed.

Fix this by flushing the space in the event of command transmission failure.

Weakness: CWE-459

Which versions are affected by CVE-2024-49851?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-49851?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-49851 being exploited?

There is no known exploitation of CVE-2024-49851 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-50725, AZL-50868, BELL-CVE-2024-49851, DEBIAN-CVE-2024-49851, GHSA-4947-vm3r-mmm2, UBUNTU-CVE-2024-49851.