CVE-2026-97423
kernel: cxl/region: Validate partition index before array access
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 24, 2026
Updated · September 29, 2026
Description
A flaw was found in the Linux kernel's Compute Express Link (CXL) subsystem. This vulnerability allows a local user to cause a Denial of Service (DoS) or system instability through an out-of-bounds memory access. During CXL region configuration, the kernel fails to validate that the partition index is non-negative before indexing an internal array, resulting in an out-of-bounds read if the partition is unresolved.
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-125 · Out-of-bounds Read