CVEvulnerability
CVE-2019-20794
4.7 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2020-05-09
- Last modified
- 2026-10-08
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.7 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.7 MEDIUM — AV:L/AC:M/Au:N/C:N/I:N/A:C
- Weaknesses
- CWE-772
Description
An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.
Affected configurations
• linux linux kernel (>= 4.18 <= 5.6.11)
Related
Weakness · CWE (1)
- CWE-772 Missing Release of Resource after Effective Lifetime weakness
References
- http://www.openwall.com/lists/oss-security/2020/08/24/1 Mailing List, Third Party Advisory
- https://github.com/sargun/fuse-example Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200608-0001/ Third Party Advisory
- https://sourceforge.net/p/fuse/mailman/message/36598753/ Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/08/24/1 Mailing List, Third Party Advisory
- https://github.com/sargun/fuse-example Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200608-0001/ Third Party Advisory
- https://sourceforge.net/p/fuse/mailman/message/36598753/ Exploit, Third Party Advisory