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CVE-2025-43915

20
FAUCET Score

CVE-2025-43915 describes a resource exhaustion vulnerability affecting Linkerd edge releases prior to edge-25.2.1 and specific versions of Buoyant Enterprise for Linkerd, where Linkerd proxy metrics can be overwhelmed. This medium-severity vulnerability has a CVSS score of 6.5, indicating it can be exploited remotely with high attack complexity, potentially leading to a high impact on availability and a low impact on integrity. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.13.0, <= 2.13.7CPE matchmatch criteria
cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
>= 2.14.0, <= 2.14.10CPE matchmatch criteria
cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
>= 2.15.0, <= 2.15.7CPE matchmatch criteria
cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
>= 2.16.0, < 2.16.5CPE matchmatch criteria
cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
>= 2.17.0, < 2.17.2CPE matchmatch criteria
cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 3rd percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/linkerd/linkerd2Fixed in: 0.0.0-20250212165942-faa3f617eef5

Vendor Advisories (1)

goGHSA-42mr-jpwh-m9rvmedium

Linkerd resource exhaustion vulnerability

May 5, 2025

References

docs.buoyant.io / security/advisories/2025-01
Vendor Advisory
buoyant.io / resources
Product