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FreeBSD: VID-7E079CE2-6B51-11EF-9A62-002590C1F29C (CVE-2024-43102): FreeBSD -- umtx Kernel panic or Use-After-Free

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FreeBSD: VID-7E079CE2-6B51-11EF-9A62-002590C1F29C (CVE-2024-43102): FreeBSD -- umtx Kernel panic or Use-After-Free

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/04/2024
Created
09/10/2024
Added
09/06/2024
Modified
09/06/2024

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.

Solution(s)

  • freebsd-upgrade-base-13_3-release-p6
  • freebsd-upgrade-base-14_0-release-p10
  • freebsd-upgrade-base-14_1-release-p4

References

  • CVE-2024-43102

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