CVE-2023-20821

MEDIUM

Yocto - Out-of-bounds Write in NVRAM

Title source: llm
STIX 2.1

Description

In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.

References (1)

Core 1

Scores

CVSS v3 6.7
EPSS 0.0002
EPSS Percentile 5.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-787
Status published
Products (7)
google/android 11.0
google/android 12.0
google/android 13.0
linuxfoundation/yocto 2.6
openwrt/openwrt 19.07.0
openwrt/openwrt 21.02.0
rdkcentral/rdk-b 2022q3
Published Sep 04, 2023
Tracked Since Feb 18, 2026