Common Weakness Enumeration
CWE-416
AllowedUse After Free
Abstraction: Variant · Status: Stable
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
10823 vulnerabilities reference this CWE, most recent first.
CVE-2026-82056 (GCVE-0-2026-82056)
Vulnerability from cvelistv5 – Published: 2026-09-08 16:12 – Updated: 2026-09-08 18:01
VLAI
EPSS
VEX
Title
Race Condition in MongoDB Server Text Index Query Parsing Leads to Heap Use-After-Free and Denial of Service
Summary
A race condition in MongoDB server's text index query parsing can cause a heap use-after-free read when handling upsert retry paths. Under certain concurrent index lifecycle operations, a raw pointer to internal text index metadata may be dereferenced after the underlying structures have been freed, leading to a server crash. An authenticated user with readWrite privileges can trigger this condition through specific concurrent text-search and index management operations, resulting in denial of service for all connected clients. This
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:01 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB | MongoDB Server |
Affected:
8.3.0 , < 8.3.9
(semver)
Affected: 8.0.0 , < 8.0.30 (semver) Affected: 7.0.0 , < 7.0.41 (semver) |
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CVE-2026-81990 (GCVE-0-2026-81990)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:31 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:28 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81989 (GCVE-0-2026-81989)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:31 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:28 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81988 (GCVE-0-2026-81988)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:31 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:28 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81986 (GCVE-0-2026-81986)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:30 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:28 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81985 (GCVE-0-2026-81985)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:30 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:28 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81984 (GCVE-0-2026-81984)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:31 – Updated: 2026-09-10 14:58
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 16:41 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81976 (GCVE-0-2026-81976)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:30 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:27 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81975 (GCVE-0-2026-81975)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:30 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:27 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
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Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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CVE-2026-81973 (GCVE-0-2026-81973)
Vulnerability from cvelistv5 – Published: 2026-09-08 20:31 – Updated: 2026-09-09 09:54
VLAI
EPSS
VEX
Title
Acrobat Reader | Use After Free (CWE-416)
Summary
Acrobat Reader is affected by a Use After Free vulnerability that could result in 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:27 UTC
CWE
- CWE-416 - Use After Free (CWE-416)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Adobe Acrobat |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 26.002.21900
(custom)
Unaffected: 26.002.21901 (custom) |
|
| Adobe | Acrobat 2024 |
Affected:
0 , ≤ 24.001.30383
(custom)
Unaffected: 24.001.30429 (custom) |
Date Public
2026-09-08 17:00
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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.