The Android Open Source Project (AOSP) provides developers with the tools and resources necessary to create custom software for Android-powered devices. Recently, a potential issue (dubbed as CVE-2023-21036) was discovered in the Android kernel, specifically in the file. This file is an essential part of Android's media and graphics processing system. The identified flaw, which involves a possible failure to truncate images, is caused by a logic error in the code.

The vulnerability affects Android product and its kernel versions. Due to the limited availability of information on this specific issue, no user cases have been confirmed. Keep in mind that the following understanding of the situation is based on the most current information.

Exploit Details

The key issue in this vulnerability is a logic error in the file. It leads to the potential truncation failure when processing images. However, it's crucial to mention that the exploit details are not widely available or discussed in public forums at this time.

In the following code snippet, you'll see a representation of how the error could have transpired

public boolean export() {
    //Some code to initialize variables and create a new bitmap

    try {
        OutputStream stream = getOutputStream();

        if (stream != null) {
            writeBitmap(mBitmap, stream);

    } catch (IOException e) {

The code in question, consisting of a try-catch block, may fail to ensure that the bitmap is truncated correctly or written to the OutputStream. Consequently, if an IOException occurs for any reason, the bitmap export could fail, leading to unintended behavior and data loss.

Understanding and reproduction of the issue would require further research and investigation.

Original References

Unfortunately, there are no official references available at the time of writing. The Android ID assigned to this issue is A-264261868, which has little to no public information linked to it. Moreover, the absence of open forums, blog posts, or reports discussing the flaw suggests its unknown nature.

The outcome of the vulnerability and its impact is unclear, as it may or may not affect specific versions of the Android kernel. Since information on this issue is scarce, a definitive statement concerning its impact cannot be made at this time. Thus, the scope extends only to the information provided above.


With the information available so far, CVE-2023-21036 appears to be a logic error in the file, posing potential risks to the truncation of images in the Android kernel. The severity and widespread implications of the vulnerability, however, cannot be ascertained due to the limited details available. To stay protected, Android developers and users should remain vigilant and keep their devices updated with the latest security patches.

This post was made with the intention of making the discovery of CVE-2023-21036 known to the broader community, but any inaccuracies, misrepresentations, or outdated information are unintended. We urge readers to keep an eye on reputable sources and official announcements related to this issue for updated information.


Published on: 03/24/2023 20:15:00 UTC
Last modified on: 03/29/2023 12:53:00 UTC