CVE-2021-4002
CVSS V2 Low 3.6
CVSS V3 Medium 4.4
Description
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.
Overview
- CVE ID
- CVE-2021-4002
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2022-03-03T22:15:08
- Last Modified Date
- 2023-02-22T17:46:52
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 5.16 | |
| cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:N
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 3.6
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 4.4
- Base Severity
- MEDIUM
- Exploitability Score
- 1.8
- Impact Score
- 2.5
References
| Reference URL | Reference Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2025726 | Issue Tracking Third Party Advisory |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea | Patch Vendor Advisory |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890 | Patch Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html | Mailing List Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5096 | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2021/11/25/1 | Exploit Mailing List Third Party Advisory |
| https://www.oracle.com/security-alerts/cpujul2022.html |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-4002 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4002 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 15:45:44 | Added to TrackCVE | |||
| 2022-12-06 11:16:56 | 2022-03-03T22:15Z | 2022-03-03T22:15:08 | CVE Published Date | updated |
| 2022-12-06 11:16:56 | 2022-07-25T18:18:27 | CVE Modified Date | updated | |
| 2022-12-06 11:16:56 | Modified | Vulnerability Status | updated | |
| 2022-12-06 11:17:02 | References | updated | ||
| 2022-12-30 15:13:11 | Modified | Undergoing Analysis | Vulnerability Status | updated |
| 2022-12-30 15:13:12 | Weakness Enumeration | update | ||
| 2023-02-22 19:13:12 | 2023-02-22T17:46:52 | CVE Modified Date | updated | |
| 2023-02-22 19:13:12 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |