CVE-2026-43404

A flaw was found in the Linux kernel. A local attacker could exploit a vulnerability in the memory management subsystem, specifically within the hmm_range_fault() function. When attempting to migrate a device-private memory page to system RAM, a failure to acquire a lock could lead to a continuous loop, preventing the system from progressing. This can result in a livelock, effectively causing a Denial of Service (DoS) where the system becomes unresponsive.

This Moderate impact flaw in the Linux kernel's memory management could allow a local attacker to cause a denial of service due to a livelock condition. Red Hat Enterprise Linux versions 7, 8, 9, and 10 are not affected as the vulnerable code is not present. Red Hat Enterprise Linux 6 Extended Life Cycle Support (ELS) is affected, but the resolution is Out Of Support Stream (OOSS), meaning it is no longer actively supported.

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 for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.