CVE-2026-37232

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-112054 Schroedinger libschroedinger through 1.0.11 contains a divide by zero vulnerability that… CWE-369
• CVE-2026-93589 ImageMagick before 7.1.2-31 and 6.9.13-56 contains a division-by-zero flaw in the FLIF… CWE-369
• CVE-2026-15417 In the silabser.sys Windows 8 driver for CP210x devices, a local unprivileged user can… CWE-369
• CVE-2026-6244 libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check… CWE-369
• CVE-2026-85458 Divide-by-zero in Xpdf 4.06 (and earlier), when a glyph in a Type 3 font has a zero… CWE-369
• CVE-2026-38345 A Division-by-Zero vulnerability in the ff_sws_init_single_context function… CWE-369
• CVE-2026-75466 libjpeg-turbo 3.2.0 contains an integer division-by-zero vulnerability in the PNG loader. CWE-369
• CVE-2026-16897 IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause a… CWE-369