CVE-2026-98935
kernel: kernel: Information disclosure via uninitialized stack memory in RTC driver
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Real-Time Clock (RTC) driver. This information disclosure vulnerability occurs because the driver fails to initialize memory padding within an internal data structure before copying alarm details to user space. A local user can exploit this flaw by querying the RTC alarm settings to read uninitialized kernel stack memory, potentially exposing sensitive system data.
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 · 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-908 · Use of Uninitialized Resource