CVE-2023-54284
Unknown Unknown - Not Provided
Integer Underflow in Linux Kernel av7110 Media Component

Publication date: 2025-12-30

Last updated on: 2025-12-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: media: av7110: prevent underflow in write_ts_to_decoder() The buf[4] value comes from the user via ts_play(). It is a value in the u8 range. The final length we pass to av7110_ipack_instant_repack() is "len - (buf[4] + 1) - 4" so add a check to ensure that the length is not negative. It's not clear that passing a negative len value does anything bad necessarily, but it's not best practice. With the new bounds checking the "if (!len)" condition is no longer possible or required so remove that.
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Meta Information
Published
2025-12-30
Last Modified
2025-12-30
Generated
2026-06-16
AI Q&A
2025-12-30
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54284
EUVD
EUVD-2023-60520
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is in the Linux kernel's media component, specifically in the av7110 driver. It involves a potential underflow in the function write_ts_to_decoder(). The issue arises because a value (buf[4]) received from the user via ts_play() is used in a calculation for the length passed to av7110_ipack_instant_repack(). Without proper checks, this length could become negative, which is not best practice and could lead to unexpected behavior. The fix adds a check to ensure the length is never negative.

Impact Analysis

The vulnerability could potentially cause unexpected behavior in the Linux kernel media driver due to an underflow condition when processing user-supplied data. While it is not clearly stated that passing a negative length causes direct harm, it is considered poor practice and could lead to instability or unpredictable results in the affected component.

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