CVE-2026-98923
kernel: arm64: io: Reject non-user protection in ioremap_prot()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 30, 2026
Description
A flaw was found in the Linux kernel. A local user can cause a Denial of Service (DoS) by triggering an unexpected kernel warning on ARM64 systems. By establishing a restricted memory mapping and reading process details through the /proc interface, the kernel incorrectly flags valid user protection attributes as invalid. On systems configured to crash on kernel warnings, this issue results in a system panic.
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-617 · Reachable Assertion