CVE-2026-42799 Out-of-bounds read in ulp

High 7.4 Published 30 Apr 2026 Updated 30 Apr 2026

An out-of-bounds read in the ASR Kestrel power control module allows attackers to cause denial of service or disclose sensitive memory information.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-42799?

CVE-2026-42799 is a high-severity memory corruption vulnerability in ASR Kestrel, published on 30 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Out-of-bounds read vulnerability in ASR Kestrel (nr_fw modules) allows Overflow Buffers.

This vulnerability is associated with program files Code/Nr/nr_fw/RA/src/NrPwrCtrl.C.

This issue affects Kestrel: before 2026/02/10.

Weakness: CWE-125

Which versions are affected by CVE-2026-42799?

It affects 1 product.

Products include Asrmicro Asr1803 Firmware.

How do I fix CVE-2026-42799?

No fix has been published for CVE-2026-42799 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-42799 being exploited?

There is no known exploitation of CVE-2026-42799 in the wild and no public exploit code.

Sources

Also known as GHSA-5xgh-84j5-pq8w.