Description (CNA)
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() installs an fd referencing a file from the lower filesystem without taking an additional reference to that file. After the btrfs ioctl completes this fd is closed, which then puts a reference to that file, leading to a refcount underflow.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Ubuntu / Shiftfs in the Linux kernel | affected 5.3.0-11.12 before 5.3 kernel*; affected 5.0 kernel before 5.0.0-35.38 |
CWE
CWE-672
References
- https://usn.ubuntu.com/usn/usn-4183-1
- https://usn.ubuntu.com/usn/usn-4184-1
- https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=601a64857b3d7040ca15c39c929e6b9db3373ec1
ADP enrichment
No English description supplied.