Is CVE-2026-97423 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-97423 being exploited in the wild.

How severe is CVE-2026-97423?

Informational severity, published 24 September 2026.

Which products and versions are affected?

Linux Foundation Linux 5.14 and later, fixed before 6.12.

Is there a fix for CVE-2026-97423?

A patch was published on 2026-06-04: Commit 16329b510f76e5b824e05bf8add8b29850f1f16f merged Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-97423 attacked?

It is attacked with local access, in an operating system.

Am I affected by CVE-2026-97423?

Check whether you run Linux Foundation Linux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-97423: Linux kernel CXL region array index validation missing

CVE-2026-97423 · Severity: info · Published 2026-09-24

The Linux kernel's CXL (Compute Express Link) memory fabric subsystem can crash or become unresponsive if a partition index fails to initialize. When memory partitions are not properly set up, the code attempts to read from an invalid array location, causing a kernel oops or denial of service on systems using CXL-connected memory.

Vendors: Linux Foundation.

Quick answers

Is CVE-2026-97423 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-97423 being exploited in the wild.
How severe is CVE-2026-97423?: Informational severity, published 24 September 2026.
Which products and versions are affected?: Linux Foundation Linux 5.14 and later, fixed before 6.12.
Is there a fix for CVE-2026-97423?: A patch was published on 2026-06-04: Commit 16329b510f76e5b824e05bf8add8b29850f1f16f merged Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-97423 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2026-97423?: Check whether you run Linux Foundation Linux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The construct_region() function in drivers/cxl/core/region.c reads cxled->part without validating it for negative values, then uses it to index cxlds->part[] array. If partition initialization fails, part remains -1, causing an out-of-bounds array access. A simple bounds check returning -EBUSY when part < 0 prevents the crash. This check was accidentally removed during a merge.

Affected products

Linux Foundation Linux 5.14 and later, fixed before 6.12

Timeline

2026-04-14: other: Fix authored by Koba Ko
2026-06-04: patched: Commit 16329b510f76e5b824e05bf8add8b29850f1f16f merged
2026-09-24: disclosed: CVE-2026-97423 published

References

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