CVE-2024-49975

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

uprobes: fix kernel info leak via [uprobes] vma

xol_add_vma() maps the uninitialized page allocated by __create_xol_area() into userspace. On some architectures (x86) this memory is readable even without VM_READ, VM_EXEC results in the same pgprot_t as VM_EXEC|VM_READ, although this doesnt really matter, debugger can read this memory anyway.

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://git.kernel.org/stable/c/21cb47db1ec9765f91304763a24565ddc22d2492
• https://git.kernel.org/stable/c/24141df5a8615790950deedd926a44ddf1dfd6d8
• https://git.kernel.org/stable/c/2aa45f43709ba2082917bd2973d02687075b6eee
• https://git.kernel.org/stable/c/34820304cc2cd1804ee1f8f3504ec77813d29c8e
• https://git.kernel.org/stable/c/5b981d8335e18aef7908a068529a3287258ff6d8
• https://git.kernel.org/stable/c/9634e8dc964a4adafa7e1535147abd7ec29441a6
• https://git.kernel.org/stable/c/f31f92107e5a8ecc8902705122c594e979a351fe
• https://git.kernel.org/stable/c/f561b48d633ac2e7d0d667020fc634a96ade33a0
• https://git.kernel.org/stable/c/fe5e9182d3e227476642ae2b312e2356c4d326a3