CVE-2019-15791
7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Ubuntu | Shiftfs in the Linux kernel | 5.3.0-11.12 < 5.3 kernel* | affected |
| Ubuntu | Shiftfs in the Linux kernel | 5.0 kernel < 5.0.0-35.38 | affected |
Weaknesses
- CWE-672: CWE-672 Operation on a Resource after Expiration or Release
ADP Enrichment
CVE Program Container
Additional 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
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
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