CVE-2024-8946

A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mp_vfs_umount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 29943546343c92334e8518695a11fc0e2ceea68b. It is recommended to apply a patch to fix this issue. In the VFS unmount process, the comparison between the mounted path string and the unmount requested string is based solely on the length of the unmount string, which can lead to a heap buffer overflow read.

• CWE-122
• CWE-787

• https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68bPatch
• https://github.com/micropython/micropython/issues/13006Exploit, Issue Tracking
• https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455Exploit, Third Party Advisory
• https://vuldb.com/?ctiid.277764Permissions Required
• https://vuldb.com/?id.277764Third Party Advisory
• https://vuldb.com/?submit.409312Third Party Advisory

Published

Sep 17, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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