CVE-2024-43102: umtx Kernel panic or Use-After-Free
First published: Thu Sep 05 2024(Updated: )
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.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | >=13.0<13.3 | |
| FreeBSD Kernel | =13.3 | |
| FreeBSD Kernel | =13.3-p1 | |
| FreeBSD Kernel | =13.3-p2 | |
| FreeBSD Kernel | =13.3-p3 | |
| FreeBSD Kernel | =13.3-p4 | |
| FreeBSD Kernel | =13.3-p5 | |
| FreeBSD Kernel | =13.4-beta3 | |
| FreeBSD Kernel | =14.0 | |
| FreeBSD Kernel | =14.0-beta5 | |
| FreeBSD Kernel | =14.0-p1 | |
| FreeBSD Kernel | =14.0-p2 | |
| FreeBSD Kernel | =14.0-p3 | |
| FreeBSD Kernel | =14.0-p4 | |
| FreeBSD Kernel | =14.0-p5 | |
| FreeBSD Kernel | =14.0-p6 | |
| FreeBSD Kernel | =14.0-p7 | |
| FreeBSD Kernel | =14.0-p8 | |
| FreeBSD Kernel | =14.0-p9 | |
| FreeBSD Kernel | =14.0-rc3 | |
| FreeBSD Kernel | =14.0-rc4-p1 | |
| FreeBSD Kernel | =14.1 | |
| FreeBSD Kernel | =14.1-p1 | |
| FreeBSD Kernel | =14.1-p2 | |
| FreeBSD Kernel | =14.1-p3 |
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Frequently Asked Questions
What is the severity of CVE-2024-43102?
CVE-2024-43102 has a high severity rating due to the potential for early freeing of memory objects, which can lead to application instability or vulnerabilities.
How do I fix CVE-2024-43102?
To fix CVE-2024-43102, update your FreeBSD system to the latest version or apply the relevant patches provided.
Which versions of FreeBSD are affected by CVE-2024-43102?
CVE-2024-43102 affects FreeBSD versions 13.0 to 13.3 and various 14.x versions, including the beta and patch releases.
What type of vulnerability is CVE-2024-43102?
CVE-2024-43102 is a memory management vulnerability that involves concurrent removals of shared memory mappings.
Is CVE-2024-43102 remotely exploitable?
CVE-2024-43102 may be exploitable remotely depending on the application context and server configuration.
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- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/freebsd
- canonical/freebsd kernel
- version/freebsd kernel/13.0
- version/freebsd kernel/13.3
- version/freebsd kernel/13.3-p1
- version/freebsd kernel/13.3-p2
- version/freebsd kernel/13.3-p3
- version/freebsd kernel/13.3-p4
- version/freebsd kernel/13.3-p5
- version/freebsd kernel/13.4-beta3
- version/freebsd kernel/14.0
- version/freebsd kernel/14.0-beta5
- version/freebsd kernel/14.0-p1
- version/freebsd kernel/14.0-p2
- version/freebsd kernel/14.0-p3
- version/freebsd kernel/14.0-p4
- version/freebsd kernel/14.0-p5
- version/freebsd kernel/14.0-p6
- version/freebsd kernel/14.0-p7
- version/freebsd kernel/14.0-p8
- version/freebsd kernel/14.0-p9
- version/freebsd kernel/14.0-rc3
- version/freebsd kernel/14.0-rc4-p1
- version/freebsd kernel/14.1
- version/freebsd kernel/14.1-p1
- version/freebsd kernel/14.1-p2
- version/freebsd kernel/14.1-p3