Vulnerabilities > CVE-2024-56662 - Out-of-bounds Read vulnerability in Linux Kernel
Summary
In the Linux kernel, the following vulnerability has been resolved: acpi: nfit: vmalloc-out-of-bounds Read in acpi_nfit_ctl Fix an issue detected by syzbot with KASAN: BUG: KASAN: vmalloc-out-of-bounds in cmd_to_func drivers/acpi/nfit/ core.c:416 [inline] BUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x20e8/0x24a0 drivers/acpi/nfit/core.c:459 The issue occurs in cmd_to_func when the call_pkg->nd_reserved2 array is accessed without verifying that call_pkg points to a buffer that is appropriately sized as a struct nd_cmd_pkg. This can lead to out-of-bounds access and undefined behavior if the buffer does not have sufficient space. To address this, a check was added in acpi_nfit_ctl() to ensure that buf is not NULL and that buf_len is less than sizeof(*call_pkg) before accessing it. This ensures safe access to the members of call_pkg, including the nd_reserved2 array.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Overread Buffers An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.
References
- https://git.kernel.org/stable/c/143f723e9eb4f0302ffb7adfdc7ef77eab3f68e0
- https://git.kernel.org/stable/c/212846fafb753a48e869e2a342fc1e24048da771
- https://git.kernel.org/stable/c/265e98f72bac6c41a4492d3e30a8e5fd22fe0779
- https://git.kernel.org/stable/c/616aa5f3c86e0479bcbb81e41c08c43ff32af637
- https://git.kernel.org/stable/c/bbdb3307f609ec4dc9558770f464ede01fe52aed
- https://git.kernel.org/stable/c/e08dc2dc3c3f7938df0e4476fe3e6fdec5583c1d