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CVE-2025-44952VulnerabilityPublished Updated

CVE-2025-44952: open5gs · n/a

Affects open5gsSource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Jun 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
GitHubopen5gs/open5gspkg:github/open5gs/open5gsOther threatsAffected
  • <=2.7.2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. Immediate mitigation should focus on restricting local access to systems running Open5GS SMF and UPF components, enforcing strict access controls and monitoring for unauthorized user activity. 2. Implement application-level sandboxing or process isolation to limit the impact of potential exploitation within the PFCP library processes. 3. Conduct thorough input validation and sanitization on the `session.dnn` field at higher layers if possible, to prevent oversized values from reaching the vulnerable function. 4. Monitor logs and network traffic for anomalous PFCP messages or unusual session parameter modifications that could indicate exploitation attempts. 5. Engage with the Open5GS community or vendors for updates and patches addressing this vulnerability, and plan for rapid deployment once available. 6. Consider deploying intrusion detection or prevention systems tailored to 5G core protocols to detect exploitation attempts. 7. Perform regular security audits and penetration testing focused on 5G core components to identify and remediate similar vulnerabilities proactively.

Description

A missing length check in `ogs_pfcp_subnet_add` function from PFCP library, used by both smf and upf in open5gs 2.7.2 and earlier, allows a local attacker to cause a Buffer Overflow by changing the `session.dnn` field with a value with length greater than 101.

References

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