CVE-2024-8946

Publication date 17 September 2024

Last updated 30 May 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.3 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
micropython 25.04 plucky
Not affected
24.10 oracular
Fixed 1.22.1+ds-1ubuntu0.24.10.1
24.04 LTS noble
Fixed 1.22.1+ds-1ubuntu0.24.04.1~esm1
22.04 LTS jammy
Fixed 1.17+ds-1.1ubuntu2+esm1
20.04 LTS focal
Fixed 1.12-1ubuntu0.1~esm1

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro

Severity score breakdown

Parameter Value
Base score 7.3 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L