Vulnerability · Published Jan 27, 2026 · Assigned by mongodb
CVE-2025-14911Integer Overflow in GridFS chunkSize Leading to Heap Allocation Failure
Medium 6.5
In plain English
A medium-severity buffer overflow in Mongo-c-driver from MongoDB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 73.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
User-controlled chunkSize metadata from MongoDB lacks appropriate validation allowing malformed GridFS metadata to overflow the bounding container.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mongo-c-driver | 1.23.1-1+deb12u3 | DEBIAN-CVE-2025-14911 |
| Debian:13 | mongo-c-driver | 1.30.4-1+deb13u2 | DEBIAN-CVE-2025-14911 |
| Debian:14 | mongo-c-driver | 2.2.0-1 | DEBIAN-CVE-2025-14911 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MongoDB | Mongo-c-driver | 0 – before 2.1.3 |
Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H