CVE-2025-38545

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

net: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info

While transitioning from netdev_alloc_ip_align() to build_skb(), memory for the skb_shared_info member of an skb was not allocated. Fix this by allocating PAGE_SIZE as the skb length, accounting for the packet length, headroom and tailroom, thereby including the required memory space for skb_shared_info.

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/02c4d6c26f1f662da8885b299c224ca6628ad232
• https://git.kernel.org/stable/c/7d6ca0c8c0caf9a13cae2de763bb1f2a9ea7eabb
• https://git.kernel.org/stable/c/fc2fffa2facac15ce711e95f98f954426e025bc5