CVE-2021-45480

An issue was discovered in the Linux kernel before 5.15.11. There is a memory leak in the __rds_conn_create() function in net/rds/connection.c in a certain combination of circumstances.

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

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.11
• https://github.com/torvalds/linux/commit/5f9562ebe710c307adc5f666bf1a2162ee7977c0
• https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
• https://www.debian.org/security/2022/dsa-5050
• https://www.debian.org/security/2022/dsa-5096