Description
The various bson_append functions in the MongoDB C driver library may be susceptible to buffer overflow when performing operations that could result in a final BSON document which exceeds the maximum allowable size (INT32_MAX), resulting in a segmentation fault and possible application crash. This issue affected libbson versions prior to 1.27.5, MongoDB Server v8.0 versions prior to 8.0.1 and MongoDB Server v7.0 versions prior to 7.0.16
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MongoDB | libbson | < 1.27.5 | 1.27.5 |
| MongoDB | MongoDB Server | 8.0 – < 8.0.1, 7.0 – < 7.0.16 | 8.0.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mongo-c-driver | 1.27.5-1 | — |
| Debian 13 | mongo-c-driver | 1.27.5-1 | — |
| Debian 12 | libbson-xs-perl | 0.8.4-2+deb12u1 | — |
| Debian 12 | mongo-c-driver | 1.23.1-1+deb12u1 | — |
| Debian 11 | libbson-xs-perl | 0.8.4-1+deb11u1 | DLA-4160-1 |
| Debian 11 | mongo-c-driver | 1.17.6-1+deb11u1 | DLA-4175-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mongo-c-driver | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | mongo-c-driver | 1.26.0-1.1ubuntu2+esm1 | USN-7613-1 |
| Ubuntu Pro 22.04 LTS | mongo-c-driver | 1.21.0-1ubuntu0.1~esm1 | USN-7613-1 |
| Ubuntu Pro 20.04 LTS | mongo-c-driver | 1.16.1-1ubuntu0.1~esm1 | USN-7613-1 |
Advisories 4
- WID-SEC-2025-0587 MongoDB: Schwachstelle ermöglicht Codeausführung und DoS BSI CERT-Bund (WID) · Apr 27, 2026
- USN-7613-1 mongo-c-driver vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-4175-1 mongo-c-driver - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4160-1 libbson-xs-perl - security update Debian Security (DSA / DLA) · Mar 9, 2026