CVE-2026-64234 Details
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.
A vulnerability in the Linux kernel's PCH UART driver can lead to a NULL pointer dereference. This issue arises because the driver does not properly check the success of a DMA memory allocation, which can result in a crash when the driver attempts to use the invalid memory reference. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to a patched version of the Linux kernel that includes the necessary checks to prevent the NULL pointer dereference. The official Linux kernel Git repository can be consulted for the latest stable releases.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf | kernel.org | Patch |
| https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43 | kernel.org | Patch |
| https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863 | kernel.org | Patch |
| https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.38, < 5.10.259 >= 5.11, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.93 >= 6.13, < 6.18.35 >= 6.19, < 7.0.12 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 12, 2026 | Initial Analysis | [email protected] |
| Jul 24, 2026 | New CVE Received | kernel.org |