CVE-2024-43102
umtx Kernel panic or Use-After-Free
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| FreeBSD FreeBSD |
≥ 14.1-RELEASE; < p4 (affected, release) ≥ 14.0-RELEASE; < p10 (affected, release) ≥ 13.3-RELEASE; < p6 (affected, release) Other versions: unknown |
CNA: freebsd |
| freebsd freebsd |
≥ 14.1; < 14.1_p4 (affected, custom) ≥ 14.0; < 14.0_p10 (affected, custom) ≥ 13.3; < 13.3_p6 (affected, custom) Other versions: unknown |
ADP: CISA-ADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 9.8 critical |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | ADP: CISA-ADP |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://security.freebsd.org/advisories/FreeBSD-SA-24:14.umtx.ascCNA: freebsd · vendor-advisory
- https://security.netapp.com/advisory/ntap-20240916-0001/ADP: CVE
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