Common Weakness Enumeration

CWE-416

Allowed

Use After Free

Abstraction: Variant · Status: Stable

API response cwe.mitre.org

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

9821 vulnerabilities reference this CWE, most recent first.

CVE-2021-21041 (GCVE-0-2021-21041)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-16 18:18
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a use-after-free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-21040 (GCVE-0-2021-21040)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-16 19:35
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-21039 (GCVE-0-2021-21039)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-16 18:34
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-21035 (GCVE-0-2021-21035)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-17 04:05
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
8.8 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-21033 (GCVE-0-2021-21033)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-16 20:21
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
8.8 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-21028 (GCVE-0-2021-21028)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-17 03:58
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
8.8 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-21021 (GCVE-0-2021-21021)

Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-17 03:27
VLAI
Title
Acrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
8.8 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: unspecified , ≤ 2020.013.20074 (custom)
Affected: unspecified , ≤ 2020.001.30018 (custom)
Affected: unspecified , ≤ 2017.011.30188 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-02-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-20292 (GCVE-0-2021-20292)

Vulnerability from cvelistv5 – Published: 2021-05-28 10:42 – Updated: 2024-08-03 17:37
VLAI
Summary
There is a flaw reported in the Linux kernel in versions before 5.9 in drivers/gpu/drm/nouveau/nouveau_sgdma.c in nouveau_sgdma_create_ttm in Nouveau DRM subsystem. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker with a local account with a root privilege, can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: Kernel 5.9
Show details on NVD website
To clipboard 

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CVE-2021-20232 (GCVE-0-2021-20232)

Vulnerability from cvelistv5 – Published: 2021-03-12 18:25 – Updated: 2025-12-03 15:03
VLAI
Summary
A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a gnutls Affected: gnutls 3.7.1
Show details on NVD website
To clipboard 

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CVE-2021-20231 (GCVE-0-2021-20231)

Vulnerability from cvelistv5 – Published: 2021-03-12 18:23 – Updated: 2024-08-03 17:30
VLAI
Summary
A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a gnutls Affected: gnutls 3.7.1
Show details on NVD website
To clipboard 

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    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-20231",
    "datePublished": "2021-03-12T18:23:59.000Z",
    "dateReserved": "2020-12-17T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:30:07.517Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}
Mitigation
Architecture and Design

Strategy: Language Selection

Choose a language that provides automatic memory management.

Mitigation
Implementation

Strategy: Attack Surface Reduction

When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.

No CAPEC attack patterns related to this CWE.

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