Heap Buffer Overflow Vulnerability in libxaac: Critical Security Flaw Detected
Summary
OSV-2026-917: Heap-buffer-overflow in ixheaace_process. Affects libxaac versions >= fb6a68848a05401a1aba5747d29595cd344faa40, < b9193197055e1e87f841f73c1a3fbca796b2da09. Fixed in b9193197055e1e87f841f73c1a3fbca796b2da09. How to fix ↓
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Background
libxaac is an open-source audio codec library designed for encoding and decoding AAC audio streams. It is widely used in various multimedia applications due to its efficiency and quality. However, like many software libraries, it is susceptible to vulnerabilities that can compromise the integrity and security of applications that depend on it. The recent discovery of a heap buffer overflow in the ixheaace_process function poses a significant risk, potentially allowing attackers to exploit this flaw for malicious purposes.
Vulnerability Detail
The vulnerability identified is a heap buffer overflow occurring in the ixheaace_process function of the libxaac library. This issue was reported through OSS-Fuzz, indicating that it can lead to unauthorized memory writes, potentially crashing the application or allowing an attacker to execute arbitrary code. The flaw was introduced in commit fb6a68848a05401a1aba5747d29595cd344faa40 and has been fixed in commit b9193197055e1e87f841f73c1a3fbca796b2da09. The severity of this vulnerability is classified as HIGH, making it critical for users to address it promptly.
How To Fix
Minimum fixed version
b9193197055e1e87f841f73c1a3fbca796b2da09
This is the first release that contains the fix.
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Workaround
As a temporary workaround, users are advised to avoid using the ixheaace_process function until the library has been updated to the patched version. Additionally, implementing input validation and sanitization can help mitigate the risk of exploitation until a proper fix is applied.
Conclusion
The heap buffer overflow vulnerability in the libxaac library poses a significant risk to applications that utilize this codec. It is crucial for developers and users to update to the patched version to mitigate potential security threats. Utilizing tools like Vulert can help monitor for vulnerabilities and ensure the safety of your software.
See every vulnerability recorded for libxaac →
FAQ
A heap buffer overflow occurs when a program writes more data to a buffer located on the heap than it can hold, potentially overwriting adjacent memory and leading to unpredictable behavior or security vulnerabilities.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By utilizing the Vulert playground, you can check if your application is affected without requiring any installation or signup.
If exploited, this vulnerability could allow attackers to crash the application or execute arbitrary code, leading to data breaches or unauthorized access to sensitive information.
Yes, you should upgrade to the fixed version of libxaac, which is identified by commit b9193197055e1e87f841f73c1a3fbca796b2da09.
If an immediate update is not possible, refrain from using the ixheaace_process function and implement input validation to reduce the risk of exploitation.
References
Related vulnerabilities
Recent vulnerabilities recorded for libxaac.
