CVE-2022-50326

In the Linux kernel, the following vulnerability has been resolved:

media: airspy: fix memory leak in airspy probe

The commit ca9dc8d06ab6 (media: airspy: respect the DMA coherency rules) moves variable buf from stack to heap, however, it only frees buf in the error handling code, missing deallocation in the success path.

Fix this by freeing buf in the success path since this variable does not have any references in other code.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Software

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

• https://git.kernel.org/stable/c/23bc5eb55f8c9607965c20d9ddcc13cb1ae59568
• https://git.kernel.org/stable/c/f4285dd02b6b2ca3435b65fb62c053dd9408fd71