CVE-2026-45871 tpm: st33zp24: Fix missing cleanup on get_burstcount() error

What is CVE-2026-45871?

CVE-2026-45871 is a medium-severity denial of service vulnerability in Linux kernel, published on 27 May 2026. 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: st33zp24: Fix missing cleanup on get_burstcount() error

get_burstcount() can return -EBUSY on timeout. When this happens, st33zp24_send() returns directly without releasing the locality acquired earlier.

Use goto out_err to ensure proper cleanup when get_burstcount() fails.

Which versions are affected by CVE-2026-45871?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-45871?

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-2026-45871 being exploited?

There is no known exploitation of CVE-2026-45871 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 BELL-CVE-2026-45871, DEBIAN-CVE-2026-45871, GHSA-x542-jg8f-r599, ROOT-OS-UBUNTU-2204-CVE-2026-45871, ROOT-OS-UBUNTU-2404-CVE-2026-45871, UBUNTU-CVE-2026-45871.