CVE-2026-42800: Deference after null check in ims_client sip

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-30 · updated 2026-10-26
Weakness: CWE-476

Description

NULL pointer dereference vulnerability in ASR1903 in ASR Lapwing_Linux on Linux (ims_client modules) allows Pointer Manipulation. This vulnerability is associated with program files sip/utils/src/sipuri.c.

Affected products

Asrmicro Asr1901 Firmware: before 1.225.003 — fixed in 1.225.003
Asrmicro Asr1903 Firmware: before 1.225.003 — fixed in 1.225.003

How to fix

Upgrade to a fixed version: Asrmicro Asr1901 Firmware 1.225.003; Asrmicro Asr1903 Firmware 1.225.003. Check the vendor advisory for mitigations.

References

https://www.asrmicro.com/en/goods/psirt?cid=44

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