CVE-2023-54093
Unknown Unknown - Not Provided
Null Pointer Dereference in Linux anysee Media Driver Causes Crash

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: media: anysee: fix null-ptr-deref in anysee_master_xfer In anysee_master_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach anysee_master_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()") [hverkuil: add spaces around +]
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54093
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
anysee anysee *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a null pointer dereference in the Linux kernel's anysee driver, specifically in the function anysee_master_xfer. The issue occurs because the function processes user-controlled data where a message buffer pointer (msg[i].buf) can be null while its length (msg[i].len) is zero. Previous checks only verified the buffer pointer but not the length, allowing malicious input to bypass these checks. When the code attempts to access msg[i].buf[0] without verifying the length, it causes a null pointer dereference, potentially crashing the system. The fix involves adding a check on msg[i].len to prevent this crash.

Impact Analysis

This vulnerability can cause a null pointer dereference leading to a system crash or denial of service in the Linux kernel's anysee driver. An attacker controlling the input to anysee_master_xfer could exploit this to crash the system or disrupt normal operation.

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