CVE-2025-38100
kernel: Linux kernel: Local Denial of Service due to TIF_IO_BITMAP inconsistency
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 3, 2025
Updated · July 8, 2026
Description
A flaw was found in the Linux kernel. A local user could trigger a system crash by exploiting an inconsistency in how the kernel manages Input/Output (IO) bitmap flags, specifically within the x86/iopl component. This occurs when a kernel thread is created from a user space thread with certain IO bitmap settings, leading to a critical error that causes the system to become unresponsive. This vulnerability results 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-476 · NULL Pointer Dereference