CVE-2022-50548

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

media: i2c: hi846: Fix memory leak in hi846_parse_dt()

If any of the checks related to the supported link frequencies fail, then the V4L2 fwnode resources dont get released before returning, which leads to a memleak. Fix this by properly freeing the V4L2 fwnode data in a designated label.

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/4368730678412a8fa71960dbda81e122dafa70f7
• https://git.kernel.org/stable/c/80113026d415e27483669db7a88b548d1ec3d3d1
• https://git.kernel.org/stable/c/a05a9ae9ef3fffc9bc7ec2bc432a249a01155f6e