How severe is CVE-2025-43971?

CVE-2025-43971 has a CVSS 3.x base score of 8.6, 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-2025-43971 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-43971?

CVE-2025-43971 affects Osrg Gobgp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-43971?

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-2025-43971 have an EU (EUVD) identifier?

Yes. CVE-2025-43971 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12349.

When was CVE-2025-43971 published?

CVE-2025-43971 was published on 2025-04-21 and last updated on 2026-06-17.

CVE-2025-43971

CVE-2025-43971 is a high-severity vulnerability in Osrg Gobgp with a CVSS 3.x base score of 8.6. 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-193.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-12349
Weakness: CWE-193
Affected product: Osrg Gobgp
Published: 2025-04-21
Last modified: 2026-06-17

Description

An issue was discovered in GoBGP before 3.35.0. pkg/packet/bgp/bgp.go allows attackers to cause a panic via a zero value for softwareVersionLen.

Frequently asked questions

What is CVE-2025-43971?: An issue was discovered in GoBGP before 3.35.0. pkg/packet/bgp/bgp.go allows attackers to cause a panic via a zero value for softwareVersionLen.
How severe is CVE-2025-43971?: CVE-2025-43971 has a CVSS 3.x base score of 8.6, 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-2025-43971 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-43971?: CVE-2025-43971 affects Osrg Gobgp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-43971?: 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-2025-43971 have an EU (EUVD) identifier?: Yes. CVE-2025-43971 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12349.
When was CVE-2025-43971 published?: CVE-2025-43971 was published on 2025-04-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:*

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