CVE-2026-84964
Fixed in a distro release EPSS <1%CVSS 5.9
A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.
Products: mongodb c_driver
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | mongo-c-driver | no fix |
| Debian 13 | mongo-c-driver | no fix |
| Debian 14 | mongo-c-driver | 2.5.2-1 |
| Ubuntu 26.04 LTS | mongo-c-driver | no fix |
| Ubuntu 26.10 | mongo-c-driver | no fix |
| Ubuntu Pro 20.04 LTS | mongo-c-driver | no fix |
| Ubuntu Pro 22.04 LTS | mongo-c-driver | no fix |
| Ubuntu Pro 24.04 LTS | mongo-c-driver | no fix |
| openSUSE Tumbleweed | mongo-c-driver | 2.5.2-1.1 |