How severe is CVE-2023-47345?

CVE-2023-47345 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-2023-47345 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-47345?

CVE-2023-47345 affects Free5gc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-47345?

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.

When was CVE-2023-47345 published?

CVE-2023-47345 was published on 2023-11-15 and last updated on 2026-06-17.

CVE-2023-47345

CVE-2023-47345 is a high-severity vulnerability in Free5gc 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Free5gc
Published: 2023-11-15
Last modified: 2026-06-17

Description

Buffer Overflow vulnerability in free5gc 3.3.0 allows attackers to cause a denial of service via crafted PFCP message with malformed PFCP Heartbeat message whose Recovery Time Stamp IE length is mutated to zero.

Frequently asked questions

What is CVE-2023-47345?: Buffer Overflow vulnerability in free5gc 3.3.0 allows attackers to cause a denial of service via crafted PFCP message with malformed PFCP Heartbeat message whose Recovery Time Stamp IE length is mutated to zero.
How severe is CVE-2023-47345?: CVE-2023-47345 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-2023-47345 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-47345?: CVE-2023-47345 affects Free5gc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-47345?: 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.
When was CVE-2023-47345 published?: CVE-2023-47345 was published on 2023-11-15 and last updated on 2026-06-17.

References

https://github.com/free5gc/free5gc/issues/483

Affected products (1)

cpe:2.3:a:free5gc:free5gc:3.3.0:*:*:*:*:*:*:*

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