CVE-2026-37232 Denial of service in n/a
A remote attacker can crash the 5G base station process by triggering a division-by-zero error in PRB utilization metrics, causing service interruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-37232?
CVE-2026-37232 is a high-severity denial of service vulnerability in n/a, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilization metric calculation. The functions fill_RRU_PrbTotDl() and fill_RRU_PrbTotUl() in openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_kpm_subs.c (lines 182 and 197) compute PRB usage percentages by dividing by the difference of two consecutive total_prb_aggregate samples without checking for zero. When a malicious xApp sends a high volume of E42_RIC_SUBSCRIPTION_REQUESTs via the FlexRIC iApp (port 36422/SCTP), the E2 Agent generates KPM Indication reports at high frequency. If two consecutive sampling intervals yield identical PRB aggregate values, the divisor becomes zero, triggering SIGFPE and crashing the entire 5G base station process (nr-softmodem). This results in complete 5G cell service interruption for all connected UEs. No authentication is required.
Weakness: CWE-369
Which versions are affected by CVE-2026-37232?
It affects 1 product.
Products include Openairinterface Openairinterface5g.
How do I fix CVE-2026-37232?
No fix has been published for CVE-2026-37232 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-37232 being exploited?
There is no known exploitation of CVE-2026-37232 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-vp5m-x22p-8w47.