CVE-2024-43102
CVE-2024-43102 is a critical-severity vulnerability in Freebsd with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: Critical (CVSS 3.x base score 10.0)
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-40036
- Weakness: CWE-416
- Affected product: Freebsd
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2024-43102?
- 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.
- How severe is CVE-2024-43102?
- CVE-2024-43102 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2024-43102 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2024-43102?
- CVE-2024-43102 primarily affects Freebsd. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2024-43102?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2024-43102 have an EU (EUVD) identifier?
- Yes. CVE-2024-43102 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40036.
- When was CVE-2024-43102 published?
- CVE-2024-43102 was published on 2024-09-05 and last updated on 2026-06-17.
References
- https://security.freebsd.org/advisories/FreeBSD-SA-24:14.umtx.asc
- https://security.netapp.com/advisory/ntap-20240916-0001/
Affected products (25)
- cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.3:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.3:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.3:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.3:p3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.3:p4:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.3:p5:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.4:beta3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p4:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p5:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p6:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p7:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p8:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:p9:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.1:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.1:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.1:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:14.1:p3:*:*:*:*:*:*
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