CVE-2026-64234
kernel: tty: serial: pch_uart: add check for dma_alloc_coherent()
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 24, 2026
Updated · September 16, 2026
Description
A flaw was found in the Linux kernel's tty subsystem, specifically within the pch_uart serial driver. This vulnerability occurs due to a missing check for the return value of dma_alloc_coherent(). An attacker could potentially exploit this to trigger a NULL pointer dereference in the dma_handle_rx() function, leading to a system crash and a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference