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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
10373 vulnerabilities reference this CWE, most recent first.
CVE-2025-68617 (GCVE-0-2025-68617)
Vulnerability from cvelistv5 – Published: 2025-12-23 22:41 – Updated: 2025-12-24 14:53
VLAI
EPSS
VEX
Title
Use after free in fluidsynth
Summary
FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From versions 2.5.0 to before 2.5.2, a race condition during unloading of a DLS file can trigger a heap-based use-after-free. A concurrently running thread may be pending to unload a DLS file, leading to use of freed memory, if the synthesizer is being concurrently destroyed, or samples of the (unloaded) DLS file are concurrently used to synthesize audio. This issue has been patched in version 2.5.2. The problem will not occur, when explicitly unloading a DLS file (before synth destruction), provided that at the time of unloading, no samples of the respective file are used by active voices. The problem will not occur in versions of FluidSynth that have been compiled without native DLS support.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-24 14:53 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/FluidSynth/fluidsynth/security… | x_refsource_CONFIRM |
| https://github.com/FluidSynth/fluidsynth/issues/1717 | x_refsource_MISC |
| https://github.com/FluidSynth/fluidsynth/issues/1728 | x_refsource_MISC |
| https://github.com/FluidSynth/fluidsynth/commit/6… | x_refsource_MISC |
| https://github.com/FluidSynth/fluidsynth/commit/9… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FluidSynth | fluidsynth |
Affected:
>= 2.5.0, < 2.5.2
|
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CVE-2025-66627 (GCVE-0-2025-66627)
Vulnerability from cvelistv5 – Published: 2025-12-09 02:52 – Updated: 2025-12-09 15:21
VLAI
EPSS
VEX
Title
Wasmi's Linear Memory has a Critical Use After Free Vulnerability
Summary
Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation leads to a Use After Free vulnerability, triggered by a WebAssembly module under certain memory growth conditions. This issue potentially leads to memory corruption, information disclosure, or code execution. This issue is fixed in versions 0.41.2, 0.47.1, 0.51.3 and 1.0.1. To workaround this issue, consider limiting the maximum linear memory sizes where feasible.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-09 15:21 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wasmi-labs/wasmi/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wasmi-labs | wasmi |
Affected:
>= 0.41.0, < 0.41.2
Affected: >= 0.42.0, < 0.47.1 Affected: >= 0.50.0, < 0.51.3 Affected: >= 1.0.0, < 1.0.1 |
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CVE-2025-66585 (GCVE-0-2025-66585)
Vulnerability from cvelistv5 – Published: 2025-12-11 20:56 – Updated: 2026-06-04 20:28
VLAI
EPSS
VEX
Title
Use After Free vulnerability in AzeoTech DAQFactory
Summary
In AzeoTech DAQFactory release 20.7 (Build 2555), a use after free vulnerability can be exploited to cause memory corruption while parsing specially crafted .ctl files. This could allow an attacker to execute code in the context of the current process.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-15 20:30 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AzeoTech | DAQFactory |
Affected:
0 , ≤ Release 20.7 (Build 2555)
(custom)
Unaffected: Release 21.1 |
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CVE-2025-66495 (GCVE-0-2025-66495)
Vulnerability from cvelistv5 – Published: 2025-12-19 07:09 – Updated: 2025-12-19 14:45
VLAI
EPSS
VEX
Title
Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability
Summary
A use-after-free vulnerability exists in the annotation handling of Foxit PDF Reader before 2025.2.1, 14.0.1, and 13.2.1 on Windows and MacOS. When opening a PDF containing specially crafted JavaScript, a pointer to memory that has already been freed may be accessed or dereferenced, potentially allowing a remote attacker to execute arbitrary code.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-19 14:45 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Foxit Software Inc. | Foxit PDF Reader |
Affected:
Versions 2025.2.1 and earlier
Affected: Versions 14.0.1 and earlier Affected: Versions 13.2.1 and eariler |
|
| Foxit Software Inc. | Foxit PDF Editor |
Affected:
Versions 2025.2.1 and earlier
Affected: Versions 14.0.1 and earlier Affected: Versions 13.2.1 and eariler |
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CVE-2025-66494 (GCVE-0-2025-66494)
Vulnerability from cvelistv5 – Published: 2025-12-19 07:08 – Updated: 2025-12-19 14:49
VLAI
EPSS
VEX
Title
Foxit PDF Reader PDF File Parsing Use-After-Free Remote Code Execution Vulnerability
Summary
A use-after-free vulnerability exists in the PDF file parsing of Foxit PDF Reader before 2025.2.1, 14.0.1, and 13.2.1 on Windows. A PDF object managed by multiple parent objects could be freed while still being referenced, potentially allowing a remote attacker to execute arbitrary code.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-19 14:49 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Foxit Software Inc. | Foxit PDF Reader |
Affected:
Versions 2025.2.1 and earlier
Affected: Versions 14.0.1 and earlier Affected: Versions 13.2.1 and eariler |
|
| Foxit Software Inc. | Foxit PDF Editor |
Affected:
Versions 2025.2.1 and earlier
Affected: Versions 14.0.1 and earlier Affected: Versions 13.2.1 and eariler |
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CVE-2025-66493 (GCVE-0-2025-66493)
Vulnerability from cvelistv5 – Published: 2025-12-19 07:07 – Updated: 2025-12-19 14:51
VLAI
EPSS
VEX
Title
Foxit PDF Reader AcroForm Use-After-Free Remote Code Execution Vulnerability
Summary
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on Windows
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Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-19 14:50 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Foxit Software Inc. | Foxit PDF Editor |
Affected:
Versions 2025.2.1 and earlier
Affected: Versions 14.0.1 and earlier Affected: Versions 13.2.1 and earlier |
|
| Foxit Software Inc. | Foxit PDF Reader |
Affected:
Versions 2025.2.1 and earlier
Affected: Versions 14.0.1 and earlier Affected: Versions 13.2.1 and earlier |
Date Public
2025-12-18 16:00
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CVE-2025-66326 (GCVE-0-2025-66326)
Vulnerability from cvelistv5 – Published: 2025-12-08 08:08 – Updated: 2025-12-08 18:15
VLAI
EPSS
VEX
Summary
Race condition vulnerability in the audio module. Impact: Successful exploitation of this vulnerability may affect availability.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-08 18:11 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
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CVE-2025-66023 (GCVE-0-2025-66023)
Vulnerability from cvelistv5 – Published: 2026-01-01 15:11 – Updated: 2026-01-05 20:04
VLAI
EPSS
VEX
Title
NanoMQ has Use-After-Free of malformed bridging message
Summary
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Versions prior to 0.24.5 have a Heap-Use-After-Free (UAF) vulnerability within the MQTT bridge client component (implemented via the underlying NanoNNG library). The vulnerability is triggered when NanoMQ acts as a bridge connecting to a remote MQTT broker. A malicious remote broker can trigger a crash (Denial of Service) or potential memory corruption by accepting the connection and immediately sending a malformed packet sequence. Version 0.34.5 contains a patch. The patch enforces stricter protocol adherence in the MQTT client SDK embedded in NanoMQ. Specifically, it ensures that CONNACK is always the first packet processed in the line. This prevents the state confusion that led to the Heap-Use-After-Free (UAF) when a malicious server sent a malformed packet sequence immediately after connection establishment. As a workaround, validate the remote broker before bridging.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-05 20:04 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/nanomq/nanomq/security/advisor… | x_refsource_CONFIRM |
| https://github.com/nanomq/nanomq/issues/2145 | x_refsource_MISC |
| https://github.com/nanomq/NanoNNG/pull/1365 | x_refsource_MISC |
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CVE-2025-65955 (GCVE-0-2025-65955)
Vulnerability from cvelistv5 – Published: 2025-12-02 23:02 – Updated: 2026-06-23 16:10
VLAI
EPSS
VEX
Title
ImageMagick has a use-after-free/double-free risk in Options::fontFamily when clearing family
Summary
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to 7.1.2-9 and 6.9.13-34, there is a vulnerability in ImageMagick’s Magick++ layer that manifests when Options::fontFamily is invoked with an empty string. Clearing a font family calls RelinquishMagickMemory on _drawInfo->font, freeing the font string but leaving _drawInfo->font pointing to freed memory while _drawInfo->family is set to that (now-invalid) pointer. Any later cleanup or reuse of _drawInfo->font re-frees or dereferences dangling memory. DestroyDrawInfo and other setters (Options::font, Image::font) assume _drawInfo->font remains valid, so destruction or subsequent updates trigger crashes or heap corruption. This vulnerability is fixed in 7.1.2-9 and 6.9.13-34.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-03 14:55 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ImageMagick/ImageMagick/securi… | x_refsource_CONFIRM |
| https://github.com/ImageMagick/ImageMagick/commit… | x_refsource_MISC |
| https://github.com/ImageMagick/ImageMagick/commit… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ImageMagick | ImageMagick |
Affected:
>= 7.0.1-0, < 7.1.2-9
Affected: < 6.9.13-34 |
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CVE-2025-65953 (GCVE-0-2025-65953)
Vulnerability from cvelistv5 – Published: 2025-11-25 23:13 – Updated: 2025-11-26 16:10
VLAI
EPSS
VEX
Title
NanoMQ UAF of retain message due to invalid MQTTV5 properties
Summary
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.22.5, a Heap-Use-After-Free (UAF) vulnerability exists in the TCP transport component of NanoMQ, which relies on the underlying NanoNNG library (specifically in src/sp/transport/mqtt/broker_tcp.c). The vulnerability is due to improper resource management and premature cleanup of message and pipe structures under specific malformed MQTTV5 retain message traffic conditions. This issue has been patched in version 0.22.5.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-26 16:10 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/nanomq/nanomq/security/advisor… | x_refsource_CONFIRM |
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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.