VDB
CVE-2020-25221
CVE-2020-25221
PUBLISHED
CVSS 7.800000190734863 HIGH
get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.
EPSS 0.67% · 50.0th percentile
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.67%
50.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | linux-hwe-edge | 5.3.0-19.20~18.04.2, 5.3.0-22.24~18.04.1, 5.3.0-23.25~18.04.1 |
| Ubuntu:Pro:14.04:LTS | linux-aws | 0, 4.4.0-1055.59, 4.4.0-1094.99 |
| Ubuntu:18.04:LTS | linux-gcp-edge | 4.18.0-1015.16~18.04.1, 5.0.0-1013.13~18.04.1, * |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1023.24, 4.15.0-1024.25, 4.15.0-1025.26 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | 0, 5.0.0-1022.25~18.04.1, 5.0.0-1024.27~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure-5.3 | *, *, * |
| Ubuntu:18.04:LTS | linux-azure | *, 4.15.0-1013.13, * |
| Ubuntu:18.04:LTS | linux-azure-edge | 5.0.0-1012.12~18.04.2, 4.18.0-1008.8~18.04.1, 4.18.0-1007.7~18.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | *, *, * |
| Ubuntu:18.04:LTS | linux-aws-5.3 | 5.3.0-1032.34~18.04.2, 5.3.0-1028.30~18.04.1, 5.3.0-1023.25~18.04.1 |
| Ubuntu:20.04:LTS | linux-raspi2 | 5.3.0-1014.16, 0, 5.3.0-1007.8 |
| Ubuntu:Pro:14.04:LTS | linux-azure | 4.15.0-1112.124~14.04.1, 4.15.0-1113.126~14.04.1, 4.15.0-1114.127~14.04.1 |
| Ubuntu:Pro:14.04:LTS | linux-lts-xenial | *, 0, 4.4.0-13.29~14.04.1 |
| Ubuntu:Pro:14.04:LTS | linux | 3.13.0-174.225, 3.13.0-181.232, 3.12.0-3.8 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 0, 5.0.0-1007.12~18.04.1, 5.0.0-1009.14~18.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 5.3.0-1016.17~18.04.1, 0, 5.3.0-1008.9~18.04.1 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.13.0-17.20~16.04.1, 4.13.0-19.22~16.04.1, 4.13.0-21.24~16.04.1 |
Timeline
- Sep 10, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 25, 2021 EPSS Score
- Dec 30, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 3, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 7, 2022 EPSS Score
- Sep 9, 2022 EPSS Score
- Nov 11, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-25221 third-party-advisory
- https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 third-party-advisory
- http://www.openwall.com/lists/oss-security/2020/09/10/4 third-party-advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 third-party-advisory
- https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a third-party-advisory
- https://www.openwall.com/lists/oss-security/2020/09/08/4 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-25221 third-party-advisory