UBUNTU-CVE-2026-120954
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-120954
Summary:
Details: A weakness in the BSON library's handling of a specialized binary vector data type allows an arithmetic wraparound when computing the number of elements described by an oversized attacker-supplied value. On builds where the platform word size is 32 bits, an application that parses untrusted BSON data can be made to process only a small fraction of the supplied elements while the operation reports success, producing results that disagree with byte-oriented accessors and with 64-bit builds of the same library. No authentication or user interaction is required beyond getting the application to parse the data. The impact is limited to data integrity; memory safety is not affected and no information is disclosed.
References: https://ubuntu.com/security/CVE-2026-120954, https://www.cve.org/CVERecord?id=CVE-2026-120954, https://jira.mongodb.org/browse/CDRIVER-6420
Affected packages
Package
Name: mongo-c-driver
Purl: pkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps%2Ffocal
Affected ranges
Type: ECOSYSTEM
Events:
