CVE-2024-6381: The bson_strfreev function in the MongoDB C driver library may be susceptible to an integer overflow where the

Q: How do I fix CVE-2024-6381?

libbson: upgrade to 1.26.2. Exact commands for each OS are on this page.

Q: Is CVE-2024-6381 being exploited?

CVE-2024-6381 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-6381 affect?

CVE-2024-6381 affects libbson. Severity is medium (CVSS 4.0). 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

Q: How urgent is CVE-2024-6381?

Priority 22/100. No elevated risk signals yet.

Routine

MEDIUM 4.0UPGRADE

CVE-2024-6381 is a medium-severity flaw (CVSS 4.0) affecting libbson. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.0 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-680
Published	2024-07-02
Last modified	2026-06-17

Publisher (CNA): MongoDB, Inc. · Vendor: mongodb

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-07-02 18:15 UTCPublished CVE record published
2026-06-17 08:17 UTCUpdated Record last modified

mongodb libbson UPGRADE

Affected: < 1.26.2

Fixed in: 1.26.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libbson || rpm -q libbson || libbson --version

2. UPGRADE to 1.26.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libbson

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libbson

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-6381?

libbson: upgrade to 1.26.2. Exact commands for each OS are on this page.

Is CVE-2024-6381 being exploited?

CVE-2024-6381 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-6381 affect?

CVE-2024-6381 affects libbson. Severity is medium (CVSS 4.0). 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

How urgent is CVE-2024-6381?

Priority 22/100. No elevated risk signals yet.

Software pages

MongoDB vulnerabilities

Related CVEs

CVE-2025-0755 HIGH 8.4 UPGRADE UPGRADE The various bson_append functions in the MongoDB C driver library may be susceptible to buffer overflow when p

References

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