CVE-2023-52754

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

media: imon: fix access to invalid resource for the second interface

imon driver probes two USB interfaces, and at the probe of the second interface, the driver assumes blindly that the first interface got bound with the same imon driver. Its usually true, but its still possible that the first interface is bound with another driver via a malformed descriptor. Then it may lead to a memory corruption, as spotted by syzkaller; imon driver accesses the data from drvdata as struct imon_context object although its a completely different one that was assigned by another driver.

This patch adds a sanity check – whether the first interface is really bound with the imon driver or not – for avoiding the problem above at the probe time.

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/0f5068519f89d928d6c51100e4b274479123829f
• https://git.kernel.org/stable/c/10ec5a97f8f5a772a1a42b4eb27196b447cd3aa9
• https://git.kernel.org/stable/c/2a493a34bd6e496c55fabedd82b957193ace178f
• https://git.kernel.org/stable/c/5e0b788fb96be36d1baf1a5c88d09c7c82a0452a
• https://git.kernel.org/stable/c/a1766a4fd83befa0b34d932d532e7ebb7fab1fa7
• https://git.kernel.org/stable/c/b083aaf5db2eeca9e362723258e5d8698f7dd84e
• https://git.kernel.org/stable/c/0f5068519f89d928d6c51100e4b274479123829f
• https://git.kernel.org/stable/c/10ec5a97f8f5a772a1a42b4eb27196b447cd3aa9
• https://git.kernel.org/stable/c/2a493a34bd6e496c55fabedd82b957193ace178f
• https://git.kernel.org/stable/c/5e0b788fb96be36d1baf1a5c88d09c7c82a0452a
• https://git.kernel.org/stable/c/a1766a4fd83befa0b34d932d532e7ebb7fab1fa7
• https://git.kernel.org/stable/c/b083aaf5db2eeca9e362723258e5d8698f7dd84e