mongo-c-driver: An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a buffer to...
CVE-2026-84965 is fixed in mongo-c-driver on 1 platform by DEBIAN-CVE-2026-84965 (version 2.5.2-1), released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a buffer to be released while a following copy operation still writes through the stale pointer. On builds where sizes are 32 bits, an unauthenticated party able to supply a sufficiently large JSON input to an application that links the library may cause that application to terminate unexpectedly, resulting in denial of service.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mongo-c-driver · Debian 14 | 2.5.2-1 | DEBIAN-CVE-2026-84965 | Sep 10, 2026 |
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