CVE-2025-43915 Linkerd resource exhaustion vulnerability
Attackers can cause resource exhaustion in Linkerd proxy metrics, leading to denial of service for service mesh deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-43915?
CVE-2025-43915 is a medium-severity denial of service vulnerability in n/a, published on 5 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-400
Which versions are affected by CVE-2025-43915?
3 open source packages ship an affected version, including github.com/linkerd/linkerd2. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
github.com/linkerd/linkerd2 Go | All versions | None |
github.com/linkerd/linkerd2 Go | All versions | 0.0.0-20250212165942-faa3f617eef5 |
github.com/linkerd/linkerd2 Go | All versions | 0.0.0-20250212165942-faa3f617eef5 |
Linux distribution packages (1)
govulncheck-vulndb openSUSE:Tumbleweed | All versions | 0.0.20250520T172319-1.1 |
Products include Linkerd Buoyant, Linkerd Linkerd.
How do I fix CVE-2025-43915?
Upgrade github.com/linkerd/linkerd2 to 0.0.0-20250212165942-faa3f617eef5 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-43915 being exploited?
There is no known exploitation of CVE-2025-43915 in the wild and no public exploit code.
Sources
Also known as GHSA-42mr-jpwh-m9rv, GO-2025-3664, MINI-8x6q-x4pc-jhh5, openSUSE-SU-2025:15144-1.