Description
The bson_strfreev function in the MongoDB C driver library may be susceptible to an integer overflow where the function will try to free memory at a negative offset. This may result in memory corruption. This issue affected libbson versions prior to 1.26.2
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MongoDB | libbson | < 1.26.2 | 1.26.2 |
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 | 1.26.2-1 | — |
| Debian 13 | mongo-c-driver | 1.26.2-1 | — |
| 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 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 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | libbson | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libbson | No fix yet | — |
Advisories 4
- 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
- WID-SEC-2024-1508 MongoDB: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 2, 2025