CVE-2026-64234 tty: serial: pch_uart: add check for dma_alloc_coherent()

What is CVE-2026-64234?

CVE-2026-64234 is a medium-severity vulnerability in Linux kernel, published on 24 Jul 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:

tty: serial: pch_uart: add check for dma_alloc_coherent()

Add a check for dma_alloc_coherent() failure to prevent a potential NULL pointer dereference in dma_handle_rx(). Properly release DMA channels and the PCI device reference using a goto ladder if the allocation fails.

Weakness: CWE-476

Which versions are affected by CVE-2026-64234?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-64234?

Apply the vendor's patch.

Is CVE-2026-64234 being exploited?

There is no known exploitation of CVE-2026-64234 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-2026-64234, DEBIAN-CVE-2026-64234, GHSA-hhmc-qrcv-x7hv, ROOT-OS-UBUNTU-2204-CVE-2026-64234, UBUNTU-CVE-2026-64234.