CVE-2021-20226
CVSS V2 Medium 6.1
CVSS V3 High 7.8
Description
A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.
Overview
- CVE ID
- CVE-2021-20226
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-02-23T17:15:13
- Last Modified Date
- 2022-06-01T18:07:38
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:C
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- COMPLETE
- Base Score
- 6.1
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 8.5
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://bugzilla.redhat.com/show_bug.cgi?id=1873476 | Issue Tracking Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210401-0001/ |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20226 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20226 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:17:34 | Added to TrackCVE | |||
| 2022-12-05 22:38:26 | 2021-02-23T17:15Z | 2021-02-23T17:15:13 | CVE Published Date | updated |
| 2022-12-05 22:38:26 | 2022-06-01T18:07:38 | CVE Modified Date | updated | |
| 2022-12-05 22:38:26 | Analyzed | Vulnerability Status | updated |