CVE-2026-37232: An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilizat

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HIGH 8.6REMOTEDOWNGRADE

CVE-2026-37232 is a high-severity flaw (CVSS 8.6) affecting openairinterface5g. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-369
Published	2026-06-01
Last modified	2026-07-22

Publisher (CNA): MITRE · Vendor: openairinterface

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 19:16 UTCPublished CVE record published
2026-07-22 07:10 UTCUpdated Record last modified

openairinterface openairinterface5g DOWNGRADE

Affected: 2.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.0

1. Check installed version

apt-cache policy openairinterface5g || rpm -q openairinterface5g || openairinterface5g --version

2. No fixed release: DOWNGRADE to a release before 2.4.0 (Debian / Ubuntu)

apt-cache madison openairinterface5g sudo apt install openairinterface5g=<VERSION_BEFORE_2.4.0> sudo apt-mark hold openairinterface5g

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openairinterface5g sudo dnf downgrade openairinterface5g-<VERSION_BEFORE_2.4.0> sudo dnf versionlock add openairinterface5g

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-37232?

openairinterface5g: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-37232 being exploited?

CVE-2026-37232 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-37232 affect?

CVE-2026-37232 affects openairinterface5g. Severity is high (CVSS 8.6). 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

How urgent is CVE-2026-37232?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

References

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