CVE-2026-90338
kernel: serial: amba-pl011: keep console clock enabled for atomic writes
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 14, 2026
Description
A flaw was found in the Linux kernel's amba-pl011 serial driver. When the pl011_console_write_atomic() function is called from an atomic context, such as during a printk operation on a PREEMPT_RT kernel, it attempts to acquire a sleeping lock. This action is forbidden in an atomic context and can lead to a system crash, resulting in 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-821 · Incorrect Synchronization