CVE-2019-15792

EIP tracks 1 public exploit for CVE-2019-15792.

AI-analyzed exploit summary The exploit demonstrates a reference counting flaw in shiftfs_btrfs_ioctl_fd_replace() leading to a use-after-free condition, causing a kernel crash. The PoC triggers the vulnerability by performing specific ioctl operations on a shiftfs-mounted filesystem.

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() calls fdget(oldfd), then without further checks passes the resulting file* into shiftfs_real_fdget(), which casts file->private_data, a void* that points to a filesystem-dependent type, to a "struct shiftfs_file_info *". As the private_data is not required to be a pointer, an attacker can use this to cause a denial of service or possibly execute arbitrary code.