Is CVE-2026-98923 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-98923 being exploited in the wild.

How severe is CVE-2026-98923?

Informational severity, published 23 October 2026.

Which products and versions are affected?

Linux kernel Multiple versions prior to fix commit bb756b11ad63832ebee58caf9e8f9381eaecff9f.

Is there a fix for CVE-2026-98923?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-98923 attacked?

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

Am I affected by CVE-2026-98923?

Check whether you run Linux kernel 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-2026-98923: Linux kernel ARM64 spurious warning in ioremap_prot

CVE-2026-98923 · Severity: info · Published 2026-10-23

The Linux kernel's ARM64 architecture code was generating invalid warning messages when legitimate user memory mappings with PROT_NONE or execute-only protections were accessed through /proc interfaces. The spurious warnings could alarm system administrators or trigger unwanted monitoring alerts, even though the operations themselves were valid and not a security issue.

Technologies: Linux kernel.

Quick answers

Is CVE-2026-98923 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-98923 being exploited in the wild.
How severe is CVE-2026-98923?: Informational severity, published 23 October 2026.
Which products and versions are affected?: Linux kernel Multiple versions prior to fix commit bb756b11ad63832ebee58caf9e8f9381eaecff9f.
Is there a fix for CVE-2026-98923?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-98923 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2026-98923?: Check whether you run Linux kernel 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

A spurious WARN_ON_ONCE() fires in ioremap_prot() when generic_access_phys() passes user page table entries with PROT_NONE or execute-only protections that lack the PTE_USER bit set. The fix changes the warning to a silent rejection, preventing the warning while maintaining the user-protection contract by cleanly failing such accesses.

Affected products

Linux kernel Multiple versions prior to fix commit bb756b11ad63832ebee58caf9e8f9381eaecff9f

Timeline

2026-10-23: disclosed

References

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