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Medium severity6.7NVD Advisory· Published Sep 4, 2023· Updated Jun 17, 2026

CVE-2023-20821

CVE-2023-20821

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

9
  • Linux Foundation/Yocto
    cpe:2.3:a:linuxfoundation:yocto:2.6:*:*:*:*:*:*:*
  • Rdkcentral/Rdk B
    cpe:2.3:a:rdkcentral:rdk-b:2022q3:*:*:*:*:*:*:*
  • Google/Android3 versions
    cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*
    • cpe:2.3:o:google:android:12.0:*:*:*:*:*:*:*
    • cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*
  • Openwrt/Openwrt2 versions
    cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:*
    • cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:*
  • Mediatek/nvramllm-create
  • MediaTek, Inc./MT2713, MT2735, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6990, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8188, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8395, MT8666, MT8673, MT8675, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T, MT8797v5
    Range: Android 11.0, 12.0, 13.0 / OpenWrt 1907, 2102 / Yocto 2.6 / RDK-B 22Q3

Patches

Vulnerability mechanics

References

1

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