CVE-2021-20268
CVSS V2 Medium 4.6
CVSS V3 High 7.8
Description
An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Overview
- CVE ID
- CVE-2021-20268
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-09T18:15:15
- Last Modified Date
- 2021-04-12T16:38:26
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 5.10.10 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
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=1923816 | Issue Tracking Patch Third Party Advisory |
| https://lore.kernel.org/bpf/CACAyw99bEYWJCSGqfLiJ9Jp5YE1ZsZSiJxb4RFUTwbofipf0dA@mail.gmail.com/T/#m8929643e99bea9c18ed490a7bc2591145eac6444 | Patch Vendor Advisory |
| https://security.netapp.com/advisory/ntap-20210409-0006/ | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20268 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20268 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:16:06 | Added to TrackCVE | |||
| 2022-12-05 23:20:02 | 2021-03-09T18:15Z | 2021-03-09T18:15:15 | CVE Published Date | updated |
| 2022-12-05 23:20:02 | 2021-04-12T16:38:26 | CVE Modified Date | updated | |
| 2022-12-05 23:20:02 | Analyzed | Vulnerability Status | updated |