What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-24 · updated 2026-08-12
• Weakness: CWE-476

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.

Affected products

• Linux kernel: from 2.6.38 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.12.93, 6.18.35, 6.6.143

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.12.93. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf
• https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59
• https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82
• https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43
• https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4
• https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8
• https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863
• https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f

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