CVE catalog

CVE-2026-84964

Severity: High · CVSS 8.2CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Sep 3, 2026, 4:18:25 PM UTC
Updated: Sep 3, 2026, 4:25:43 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.26% · Oct 23, 2026

A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	mongo-c-driver	sid	`2.5.7-1`	fixed
Debian	mongo-c-driver	forky	`2.5.6-1`	fixed
Debian	mongo-c-driver	trixie	`1.30.4-1+deb13u3`	vulnerable
Debian	mongo-c-driver	bookworm	`1.23.1-1+deb12u3`	vulnerable
Cpe	c_driver	Not reported	`2.5.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	mongo-c-driver	source	sid	`2.5.2-1`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	forky	`2.5.2-1`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	c_driver	cpe	Not reported	`2.5.2`	Not reported	NVD-CVE-2026-84964	Not reported

Notes

[trixie] mongo-c-driver: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libbson-1.0-0]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libbson-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libbson-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libmongoc-1.0-0]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libmongoc-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libmongoc-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12

[Debian 13 (Trixie)]

[libbson-1.0-0t64]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libbson-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libbson-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libmongoc-1.0-0t64]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libmongoc-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libmongoc-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13

Observed: Oct 23, 2026, 9:32:40 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]