CVE-2020-25221
CVSS V2 High 7.2
CVSS V3 High 7.8
Description
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.
Overview
- CVE ID
- CVE-2020-25221
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-09-10T14:15:17
- Last Modified Date
- 2023-02-02T22:23:15
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 5.7.0 | 5.8.7 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 7.2
- Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.8
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a | Issue Tracking Patch Vendor Advisory |
| https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 | Issue Tracking Patch Vendor Advisory |
| https://www.openwall.com/lists/oss-security/2020/09/08/4 | Mailing List Patch Third Party Advisory |
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 | Release Notes Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2020/09/10/4 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20201001-0003/ |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-25221 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25221 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:11:26 | Added to TrackCVE | |||
| 2022-12-04 22:19:07 | 2020-09-10T14:15Z | 2020-09-10T14:15:17 | CVE Published Date | updated |
| 2022-12-04 22:19:07 | 2020-10-01T14:15:15 | CVE Modified Date | updated | |
| 2022-12-04 22:19:07 | Undergoing Analysis | Vulnerability Status | updated | |
| 2023-02-02 23:10:47 | 2023-02-02T22:23:15 | CVE Modified Date | updated | |
| 2023-02-02 23:10:47 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |