How severe is CVE-2025-56568?

CVE-2025-56568 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-56568 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-56568?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-56568 have an EU (EUVD) identifier?

Yes. CVE-2025-56568 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209599.

When was CVE-2025-56568 published?

CVE-2025-56568 was published on 2026-04-30 and last updated on 2026-06-17.

CVE-2025-56568

CVE-2025-56568 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-617.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209599
Weakness: CWE-617
Published: 2026-04-30
Last modified: 2026-06-17

Description

Assertion failure vulnerability in the PCO (Protocol Configuration Options) parser in the SMF (Session Management Function) component of Open5GS before v2.7.5 allows remote attackers to cause denial of service via specially crafted NGAP messages containing malformed length fields in protocol configuration data.

Frequently asked questions

What is CVE-2025-56568?: Assertion failure vulnerability in the PCO (Protocol Configuration Options) parser in the SMF (Session Management Function) component of Open5GS before v2.7.5 allows remote attackers to cause denial of service via specially crafted NGAP messages containing malformed length fields in protocol configuration data.
How severe is CVE-2025-56568?: CVE-2025-56568 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-56568 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-56568?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-56568 have an EU (EUVD) identifier?: Yes. CVE-2025-56568 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209599.
When was CVE-2025-56568 published?: CVE-2025-56568 was published on 2026-04-30 and last updated on 2026-06-17.

References

Other CWE-617 (Reachable Assertion) vulnerabilities

CVE-2020-3615 — Critical (CVSS 9.8): Valid deauth/disassoc frames is dropped in case if RMF is enabled and some rouge peer keep on sending rogue…
CVE-2019-9795 — Critical (CVSS 9.8): A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by…
CVE-2026-31739 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: crypto: tegra - Add missing CRYPTO_ALG_ASYNC The…
CVE-2020-12417 — High (CVSS 8.8): Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in…
CVE-2020-6623 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.
CVE-2020-6619 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__buf_seek.

Browse all CWE-617 (Reachable Assertion) vulnerabilities →