Copyright © 2012 Red Hat, Inc. All rights reserved.
Moderate
2026-05-05T00:00:00
kernel: serial: 8250: Fix TX deadlock when using DMA
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-413
A flaw was found in the Linux kernel's 8250 serial driver when utilizing Direct Memory Access (DMA). An issue arises when a DMA transaction is terminated asynchronously, as the system may not properly clear the `dma->tx_running` flag. This prevents subsequent transmit (TX) DMA transactions from being scheduled, leading to a deadlock. This vulnerability can result in a Denial of Service (DoS), rendering the serial communication unresponsive.
Red Hat Enterprise Linux 10
Fix deferred
kernel
Red Hat Enterprise Linux 6
Not affected
kernel
Red Hat Enterprise Linux 7
Not affected
kernel
Red Hat Enterprise Linux 7
Not affected
kernel-rt
Red Hat Enterprise Linux 8
Not affected
kernel
Red Hat Enterprise Linux 8
Not affected
kernel-rt
Red Hat Enterprise Linux 9
Fix deferred
kernel
Red Hat Enterprise Linux 9
Fix deferred
kernel-rt
https://www.cve.org/CVERecord?id=CVE-2026-43061
https://nvd.nist.gov/vuln/detail/CVE-2026-43061
https://lore.kernel.org/linux-cve-announce/2026050537-CVE-2026-43061-91b7@gregkh/T