CVE-2025-43915

In Linkerd edge releases before edge-25.2.1, and Buoyant Enterprise for Linkerd releases 2.13.0–2.13.7, 2.14.0–2.14.10, 2.15.0–2.15.7, 2.16.0–2.16.4, and 2.17.0–2.17.1, resource exhaustion can occur for Linkerd proxy metrics.

Published: 2025-05-05 Last update: 2025-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-43915 is rated Moderate Risk (46.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.35%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-43915

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-01 0.05% 0.35% +0.29%
2 2025-10-13 0.04% 0.05% +0.01%
3 2025-10-01 — 0.04% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-43915

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 4.2 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-43915

GitHub Security Advisory for CVE-2025-43915

GHSA-42mr-jpwh-m9rv · Severity: medium · Ecosystem: go — Linkerd resource exhaustion vulnerability

Affected software / configurations for CVE-2025-43915

Vendor Product Version Raw CPE
linkerd buoyant >= 2.13.0, <= 2.13.7 cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
linkerd buoyant >= 2.14.0, <= 2.14.10 cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
linkerd buoyant >= 2.15.0, <= 2.15.7 cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
linkerd buoyant >= 2.16.0, < 2.16.5 cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
linkerd buoyant >= 2.17.0, < 2.17.2 cpe:2.3:a:linkerd:buoyant:*:*:*:*:enterprise:linkerd:*:*
linkerd linkerd < 25.2.1 cpe:2.3:a:linkerd:linkerd:*:*:*:*:edge:kubernetes:*:*

References for CVE-2025-43915

cvelogic Threat Intelligence