SB2026090767 - Fedora EPEL 8 update for mongo-c-driver

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Main Vulnerability Database SB2026090767

SB2026090767 - Fedora EPEL 8 update for mongo-c-driver

Published: September 7, 2026

Security Bulletin ID SB2026090767
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Double free (CVE-ID: CVE-2026-84964)

CWE-ID: CWE-415 - Double Free

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver when processing specially formed certificate data during a TLS handshake. A remote attacker can provide a crafted certificate to cause a denial of service.

The TLS endpoint must already be trusted by the connecting client application.


2) Integer overflow (CVE-ID: CVE-2026-84965)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an integer overflow in the BSON library\'s JSON parsing code when parsing a sufficiently large JSON input. A remote attacker can supply a sufficiently large JSON input to cause a denial of service.

Only builds where sizes are 32 bits are affected.


3) Heap-based buffer overflow (CVE-ID: CVE-2026-84969)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to alter data outside the intended buffer.

The vulnerability exists due to a heap-based buffer overflow in the BSON-to-JSON conversion helpers when encoding a binary field in output cut short at a caller-configured length limit. A remote attacker can supply a document containing a binary field to alter data outside the intended buffer.


4) Incorrect Conversion between Numeric Types (CVE-ID: CVE-2026-84963)

CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to alter data.

The vulnerability exists due to incorrect numeric conversion in the JSON-to-BSON parser when processing unusually large JSON string values. A remote attacker can supply crafted JSON input to alter data.


Remediation

Install update from vendor's website.

References