VDB
CVE-2019-20794
CVE-2019-20794
PUBLISHED
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.
EPSS 0.09% · 26.2th percentile
Risk Scores
EPSS Score
0.09%
26.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | linux-azure-edge | 4.18.0-1006.6~18.04.1, 4.18.0-1007.7~18.04.1, 4.18.0-1008.8~18.04.1 |
| Ubuntu:Pro:18.04:LTS | linux-gcp-5.4 | 5.4.0-1030.32~18.04.1, 5.4.0-1032.34~18.04.1, 5.4.0-1034.37~18.04.1 |
| Ubuntu:Pro:18.04:LTS | linux | 4.15.0-65.74, 4.15.0-64.73, 4.15.0-62.69 |
| Ubuntu:Pro:18.04:LTS | linux-oracle-5.4 | 5.4.0-1101.110~18.04.1, 5.4.0-1100.109~18.04.1, 5.4.0-1099.108~18.04.1 |
| Ubuntu:Pro:20.04:LTS | linux-riscv-5.15 | 5.15.0-1068.72~20.04.1, *, * |
| Ubuntu:Pro:FIPS:20.04:LTS | linux-aws-fips | 5.4.0-1021.21+fips2, 0 |
| Ubuntu:20.04:LTS | linux-azure-fde | 5.4.0-1103.109+cvm1.1, 5.4.0-1076.79+cvm1.1, 5.4.0-1080.83+cvm1.1 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | 6.14.0-1007.7, 6.14.0-1014.14, 6.14.0-1016.16 |
| Ubuntu:Pro:18.04:LTS | linux-hwe-5.4 | 5.4.0-105.119~18.04.1, *, * |
| Ubuntu:22.04:LTS | linux | 5.15.0-56.62, 0, 5.13.0-19.19 |
| Ubuntu:25.10 | linux-gcp | 6.17.0-1001.1, 6.17.0-1002.2, 6.17.0-1003.3 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | *, 5.19.0-1019.21~22.04.1, 5.19.0-1018.19~22.04.1 |
| Ubuntu:24.04:LTS | linux-riscv | 6.8.0-55.57.1, 6.8.0-57.59.1, 6.8.0-58.60.1 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | 6.5.0-1004.4, 6.5.0-1023.24, 0 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1064.72, 5.15.0-1065.73, 5.15.0-1058.66 |
| Ubuntu:Pro:20.04:LTS | linux-nvidia-tegra-5.15 | 5.15.0-1051.51~20.04.1, 5.15.0-1050.50~20.04.1, 5.15.0-1049.49~20.04.1 |
| Ubuntu:Pro:FIPS:16.04:LTS | linux-fips | 4.4.0-1060.66, 4.4.0-1063.69, 4.4.0-1065.71 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1017.17~24.04.1, *, 0 |
| Ubuntu:18.04:LTS | linux-hwe | 4.18.0-14.15~18.04.1, 4.18.0-13.14~18.04.1, 0 |
| Ubuntu:Pro:20.04:LTS | linux-gcp | 5.4.0-1075.80, 5.4.0-1041.44, 5.4.0-1151.160 |
…and 219 more
Exploit Intelligence
Timeline
- May 9, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2019-20794 third-party-advisory
- https://sourceforge.net/p/fuse/mailman/message/36598753/ third-party-advisory
- https://github.com/sargun/fuse-example third-party-advisory
- https://lore.kernel.org/lkml/1e796f9e008fb78fb96358ff74f39bd4865a7c88.1604926010.git.gladkov.alexey@gmail.com/ third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2019-20794 third-party-advisory