Is CVE-2025-43973 in the CISA KEV catalog?

No. CVE-2025-43973 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-43973?

CVE-2025-43973 has a CVSS v3 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2025-43973?

CVE-2025-43973 has an EPSS score of 0.47% (38th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-43973?

Upgrade gobgp on debian 13 to 3.35.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2025-43973

MEDIUM

6.8

CVSS v3

NVD

Description

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

CWE-193

How to fix

Remediation Available

gobgpDebian

Fixed in:3.35.0-1CVE-2025-43973

gobgpUbuntu

Fixed in:1.29-1ubuntu0.1+esm1USN-7661-1

Fixed in:2.12.0-1ubuntu0.1~esm2USN-7661-1

Fixed in:2.25.0-3ubuntu0.1+esm2USN-7661-1

Fixed in:3.23.0-1ubuntu0.3+esm2USN-7661-1

gobgpdUbuntu

Fixed in:1.29-1ubuntu0.1+esm1USN-7661-1

Fixed in:2.12.0-1ubuntu0.1~esm2USN-7661-1

Fixed in:2.25.0-3ubuntu0.1+esm2USN-7661-1

Fixed in:3.23.0-1ubuntu0.3+esm2USN-7661-1

golang-github-osrg-gobgp-devUbuntu

Fixed in:1.29-1ubuntu0.1+esm1USN-7661-1

Fixed in:2.12.0-1ubuntu0.1~esm2USN-7661-1

Fixed in:2.25.0-3ubuntu0.1+esm2USN-7661-1

Fixed in:3.23.0-1ubuntu0.3+esm2USN-7661-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploit Intelligence

0.47%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Patch2

Related Vulnerabilities

Other CWE-193 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-3156	High	7.8	99%	KEV	Fix
CVE-2003-0466	Critical	9.8	78%	-	-
CVE-2023-44444	High	7.8	56%	-	Fix
CVE-2021-23017	High	7.7	53%	-	Fix
CVE-2023-28709	High	7.5	52%	-	Fix
CVE-2018-8828	Critical	9.8	31%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-08.