CVE-2025-22865 ParsePKCS1PrivateKey panic with partial keys in crypto/x509
An attacker can cause a denial of service by providing a malformed RSA private key to the Go crypto/x509 package, triggering a panic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-22865?
CVE-2025-22865 is a high-severity denial of service vulnerability in Go standard library crypto/x509, published on 28 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Using ParsePKCS1PrivateKey to parse a RSA key that is missing the CRT values would panic when verifying that the key is well formed.
Which versions are affected by CVE-2025-22865?
2 open source packages ship an affected version, including golang and stdlib.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | From 1.24.0-0 | 1.24.0-rc.2 |
stdlib Go | From 1.24.0-0 | 1.24.0-rc.2 |
How do I fix CVE-2025-22865?
Upgrade golang to 1.24.0-rc.2 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-2025-22865 being exploited?
There is no known exploitation of CVE-2025-22865 in the wild and no public exploit code.
Sources
Also known as BIT-golang-2025-22865, DEBIAN-CVE-2025-22865, ECHO-633d-3526-5d52, GHSA-v7qx-rccr-23xm, GO-2025-3421, UBUNTU-CVE-2025-22865.