CVE-2025-13735 Out-of-bounds Read in nr flc
An out-of-bounds read in the ASR Lapwing Linux kernel allows attackers to read sensitive memory or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-13735?
CVE-2025-13735 is a high-severity memory corruption vulnerability in ASR Lapwing_Linux, published on 26 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Out-of-bounds Read vulnerability in ASR1903、ASR3901 in ASR Lapwing_Linux on Linux (nr_fw modules). This vulnerability is associated with program files Code/nr_fw/DLP/src/NrCgi.C.
This issue affects Lapwing_Linux: before 2025/11/26.
Weakness: CWE-125
Which versions are affected by CVE-2025-13735?
How do I fix CVE-2025-13735?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-13735 being exploited?
There is no known exploitation of CVE-2025-13735 in the wild and no public exploit code.
Sources
Also known as GHSA-8mjc-g2w7-fch8, ROOT-OS-UBUNTU-2204-CVE-2025-13735.