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
2026-05-07
AI Q&A
2025-12-30
EPSS Evaluated
2026-05-05
NVD
CVE-2023-54284
EUVD
EUVD-2023-60520
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

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.


How can this vulnerability impact me? :

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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