CVE-2019-20810

go7007_snd_init in drivers/media/usb/go7007/snd-go7007.c in the Linux kernel before 5.6 does not call snd_card_free for a failure path, which causes a memory leak, aka CID-9453264ef586.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

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

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9453264ef58638ce8976121ac44c07a3ef375983
• https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html
• https://usn.ubuntu.com/4427-1/
• https://usn.ubuntu.com/4439-1/
• https://usn.ubuntu.com/4440-1/
• https://usn.ubuntu.com/4483-1/
• https://usn.ubuntu.com/4485-1/