In the Linux kernel before 5.0.3, a memory leak exits in hsr_dev_finalize() in net/hsr/hsr_device.c if hsr_add_port fails to add a port, which may cause denial of service, aka CID-6caabe7f197d.
Weakness
The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.
Affected Software
Name |
Vendor |
Start Version |
End Version |
Linux_kernel |
Linux |
5.1 |
5.1 |
Linux_kernel |
Linux |
5.0 |
* |
Linux_kernel |
Linux |
3.17 |
* |
Linux_kernel |
Linux |
4.14 |
* |
Linux_kernel |
Linux |
4.20 |
* |
Linux_kernel |
Linux |
4.4 |
* |
Linux_kernel |
Linux |
4.9 |
* |
Linux_kernel |
Linux |
4.19 |
* |
Potential Mitigations
- Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
- For example, glibc in Linux provides protection against free of invalid pointers.
- When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
- To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.
References