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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• collector/mitre-cve
• source/MITRE
• agent/title
• agent/references
• agent/weakness
• agent/description
• agent/type
• agent/first-publish-date
• agent/author
• agent/event
• collector/nvd-api
• source/NVD
• agent/software-canonical-lookup
• agent/severity
• agent/softwarecombine
• agent/tags
• agent/last-modified-date
• vendor/freebsd
• canonical/freebsd freebsd
• version/freebsd freebsd/13.0
• version/freebsd freebsd/13.3
• version/freebsd freebsd/13.3-p1
• version/freebsd freebsd/13.3-p2
• version/freebsd freebsd/13.3-p3
• version/freebsd freebsd/13.3-p4
• version/freebsd freebsd/13.3-p5
• version/freebsd freebsd/13.4-beta3
• version/freebsd freebsd/14.0
• version/freebsd freebsd/14.0-beta5
• version/freebsd freebsd/14.0-p1
• version/freebsd freebsd/14.0-p2
• version/freebsd freebsd/14.0-p3
• version/freebsd freebsd/14.0-p4
• version/freebsd freebsd/14.0-p5
• version/freebsd freebsd/14.0-p6
• version/freebsd freebsd/14.0-p7
• version/freebsd freebsd/14.0-p8
• version/freebsd freebsd/14.0-p9
• version/freebsd freebsd/14.0-rc3
• version/freebsd freebsd/14.0-rc4-p1
• version/freebsd freebsd/14.1
• version/freebsd freebsd/14.1-p1
• version/freebsd freebsd/14.1-p2
• version/freebsd freebsd/14.1-p3