Vulnerabilities > CVE-2024-53213 - Double Free 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: net: usb: lan78xx: Fix double free issue with interrupt buffer allocation In lan78xx_probe(), the buffer `buf` was being freed twice: once implicitly through `usb_free_urb(dev->urb_intr)` with the `URB_FREE_BUFFER` flag and again explicitly by `kfree(buf)`. This caused a double free issue. To resolve this, reordered `kmalloc()` and `usb_alloc_urb()` calls to simplify the initialization sequence and removed the redundant `kfree(buf)`. Now, `buf` is allocated after `usb_alloc_urb()`, ensuring it is correctly managed by `usb_fill_int_urb()` and freed by `usb_free_urb()` as intended.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/03819abbeb11117dcbba40bfe322b88c0c88a6b6
- https://git.kernel.org/stable/c/7ac9f3c981eeceee2ec4d30d850f4a6f50a1ec40
- https://git.kernel.org/stable/c/977128343fc2a30737399b58df8ea77e94f164bd
- https://git.kernel.org/stable/c/a422ebec863d99d5607fb41bb7af3347fcb436d3
- https://git.kernel.org/stable/c/b09512aea6223eec756f52aa584fc29eeab57480