Executive Summary

CVE-2026-3393 is a heap-based buffer overflow vulnerability found in the jarikomppa soloud audio library, specifically in the function SoLoud::Wav::loadflac within the file src/audiosource/wav/soloud_wav.cpp. This flaw occurs when the function improperly handles input data while loading FLAC audio files embedded in WAV containers or loaded from memory, causing a write operation beyond the allocated heap buffer.

The overflow happens due to incorrect bounds checking or buffer size miscalculation during FLAC data parsing, leading to memory corruption in the heap area. Exploitation requires local access, meaning an attacker must have local system privileges to trigger the vulnerability. The issue has been publicly disclosed with proof-of-concept exploits available, but no patches or mitigations have been provided yet.

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Impact Analysis

This vulnerability can impact system availability by causing crashes or instability in applications using the SoLoud audio library when processing crafted FLAC audio files. The heap-based buffer overflow can lead to memory corruption, which might result in application crashes or potentially allow an attacker with local access to execute arbitrary code.

Since exploitation requires local privileges, remote attackers cannot exploit this vulnerability directly. However, if an attacker gains local access, they could leverage this flaw to disrupt audio processing or escalate their privileges through further exploitation.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability can be detected by attempting to load crafted FLAC audio files embedded in WAV containers or loaded from memory using the SoLoud audio library's functions, specifically SoLoud::Wav::loadflac or loadMem. Detection involves reproducing the heap-based buffer overflow or crashes using a test harness that reads an input file into memory and calls the vulnerable functions."}, {'type': 'paragraph', 'content': 'A practical approach is to use the publicly available proof-of-concept exploit and test harness that triggers the overflow and crash, which can be run on a Linux x86_64 system with AddressSanitizer (ASAN) enabled to detect invalid memory writes.'}, {'type': 'paragraph', 'content': 'Suggested commands include compiling the SoLoud library with ASAN enabled and running the test harness with crafted audio files to observe crashes or ASAN reports. For example:'}, {'type': 'list_item', 'content': 'Compile SoLoud with ASAN: `clang++ -fsanitize=address -g -O1 -o test_harness test_harness.cpp`'}, {'type': 'list_item', 'content': 'Run the test harness with a crafted FLAC-in-WAV file: `./test_harness crafted_audio.wav`'}, {'type': 'paragraph', 'content': 'Monitoring logs for AddressSanitizer output indicating heap-buffer-overflow or segmentation faults during audio file loading is key to detecting the vulnerability.'}] [1, 4, 5]

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Mitigation Strategies

Currently, there are no known patches or countermeasures provided by the vendor or maintainers of the SoLoud audio library for this vulnerability.

Immediate mitigation steps include avoiding the use of the affected versions of the SoLoud library (up to 20200207) especially in environments where local users could exploit this vulnerability.

Consider replacing or upgrading to alternative audio libraries that do not contain this vulnerability.

Restrict local access to systems running the vulnerable software to trusted users only, as exploitation requires local privileges.

Monitor for any updates or patches from the vendor or community and apply them as soon as they become available.

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