Vulnerabilities > CVE-2022-49478 - Improper Validation of Array Index vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init Syzbot reported that -1 is used as array index. The problem was in missing validation check. hdw->unit_number is initialized with -1 and then if init table walk fails this value remains unchanged. Since code blindly uses this member for array indexing adding sanity check is the easiest fix for that. hdw->workpoll initialization moved upper to prevent warning in __flush_work.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
References
- https://git.kernel.org/stable/c/1310fc3538dcc375a2f46ef0a438512c2ca32827
- https://git.kernel.org/stable/c/24e807541e4a9263ed928e6ae3498de3ad43bd1e
- https://git.kernel.org/stable/c/2e004fe914b243db41fa96f9e583385f360ea58e
- https://git.kernel.org/stable/c/3309c2c574e13b21b44729f5bdbf21f60189b79a
- https://git.kernel.org/stable/c/4351bfe36aba9fa7dc9d68d498d25d41a0f45e67
- https://git.kernel.org/stable/c/471bec68457aaf981add77b4f590d65dd7da1059
- https://git.kernel.org/stable/c/a3304766d9384886e6d3092c776273526947a2e9
- https://git.kernel.org/stable/c/a3660e06675bccec4bf149c7229ea1d491ba10d7
- https://git.kernel.org/stable/c/f99a8b1ec0eddc2931aeaa4f490277a15b39f511