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CVE-2024-43102

FreeBSD vulnerability

10.0 CRITICALEPSS 0.68%
  1. Published5 Sept 2024

Description

Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of UMTX_OP_SHM can lead to decreasing the reference count of the object representing the mapping too many times, causing it to be freed too early. A malicious code exercizing the UMTX_SHM_DESTROY sub-request in parallel can panic the kernel or enable further Use-After-Free attacks, potentially including code execution or Capsicum sandbox escape.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

FreeBSD≥ 13.0 < 13.3 · 13.3 · 13.4 · 14.0

Remediation

Fixed in
FreeBSD≥ 13.3

Frequently asked

Is CVE-2024-43102 being actively exploited?

CVE-2024-43102 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.68%.

How severe is CVE-2024-43102?

CVE-2024-43102 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.68% probability of exploitation.

Which products are affected by CVE-2024-43102?

Affected products include FreeBSD.

How do I fix CVE-2024-43102?

Upgrade affected software to a fixed version, for example FreeBSD 13.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-43102 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.