GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

10829 vulnerabilities reference this CWE, most recent first.

CVE-2026-57984 (GCVE-0-2026-57984)

Vulnerability from cvelistv5 – Published: 2026-07-03 20:35 – Updated: 2026-09-09 19:36
VLAI
Title
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 00:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Edge (Chromium-based) Affected: 1.0.0.0 , < 150.0.4078.48 (custom)
    cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-03 14:00
Show details on NVD website
To clipboard 

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CVE-2026-57981 (GCVE-0-2026-57981)

Vulnerability from cvelistv5 – Published: 2026-07-03 20:35 – Updated: 2026-09-09 19:36
VLAI
Title
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 00:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Edge (Chromium-based) Affected: 1.0.0.0 , < 150.0.4078.48 (custom)
    cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-03 14:00
Show details on NVD website
To clipboard 

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CVE-2026-57842 (GCVE-0-2026-57842)

Vulnerability from cvelistv5 – Published: 2026-09-11 13:48 – Updated: 2026-09-11 14:56 X_Open Source
VLAI
Title
NetBSD COMPAT_NETBSD32 Double Free / Use-After-Free via recvmsg() msg_iovlen
Summary
NetBSD contains a use-after-free and double-free vulnerability in msg_recv_copyin() within the COMPAT_NETBSD32 compatibility layer due to a missing return statement before the cleanup label on the success path. Any local user able to execute a 32-bit binary on a 64-bit NetBSD system can trigger a kernel panic or memory corruption by calling recvmsg() with msg_iovlen between 9 and IOV_MAX, causing the kernel to access a freed iovec buffer and subsequently free the same allocation a second time.
Severity
7.3 (High)
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 14:56 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
The NetBSD Foundation NetBSD Affected: 8.0 , ≤ 8.3 (custom)
Affected: 9.0 , < 9.5 (custom)
Affected: 10.0 , ≤ 10.1 (custom)
Create a notification for this product.
Date Public
2026-06-26 00:00
Credits
Tristan CLERC VulnCheck
Show details on NVD website
To clipboard 

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CVE-2026-57589 (GCVE-0-2026-57589)

Vulnerability from cvelistv5 – Published: 2026-06-25 00:33 – Updated: 2026-06-26 03:55
VLAI
Summary
sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().
Severity
7.4 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 00:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenBSD OpenBSD Affected: 0 , ≤ 7.9 (custom)
    cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-57585 (GCVE-0-2026-57585)

Vulnerability from cvelistv5 – Published: 2026-06-30 21:36 – Updated: 2026-07-01 14:54
VLAI
Title
MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error
Summary
MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 14:54 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
msgpack msgpack-python Affected: < 1.2.1
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CVE-2026-57438 (GCVE-0-2026-57438)

Vulnerability from cvelistv5 – Published: 2026-06-25 14:39 – Updated: 2026-06-25 16:23
VLAI
Title
Nokogiri: Possible Use-After-Free in XInclude Processing
Summary
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, XInclude substitution performed by Nokogiri::XML::Node#do_xinclude replaced each <xi:include> in place, freeing the include node along with its children (such as <xi:fallback> and its descendants) and any namespaces declared on them. If an application had already exposed one of those nodes or namespaces to Ruby, the corresponding Ruby object was left pointing at freed memory. Using the object could result in invalid reads or writes to memory. This vulnerability is fixed in 1.19.4.
Severity
2.2 (Low)
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 16:23 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
sparklemotion nokogiri Affected: < 1.19.4
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CVE-2026-57437 (GCVE-0-2026-57437)

Vulnerability from cvelistv5 – Published: 2026-06-25 14:34 – Updated: 2026-06-25 15:00
VLAI
Title
Nokogiri: Possible Use-After-Free when directly using `NokogirI::XML::XPathContext` beyond document lifetime
Summary
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault. This is only reachable when application code constructs an XPathContext directly and lets the document become unreachable while continuing to use the context. The normal Document#xpath, #css, and related search methods are not affected, and it is not triggerable by malicious document input. This vulnerability is fixed in 1.19.4.
Severity
1.7 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 14:59 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
sparklemotion nokogiri Affected: < 1.19.4
Create a notification for this product.
Show details on NVD website
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CVE-2026-57436 (GCVE-0-2026-57436)

Vulnerability from cvelistv5 – Published: 2026-06-25 14:33 – Updated: 2026-06-25 23:27
VLAI
Title
Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type
Summary
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Document#root= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage collection or finalization, leading to an invalid memory read or potentially a segfault. This vulnerability is fixed in 1.19.4.
Severity
1.7 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 23:26 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
sparklemotion nokogiri Affected: < 1.19.4
Create a notification for this product.
Show details on NVD website
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CVE-2026-57435 (GCVE-0-2026-57435)

Vulnerability from cvelistv5 – Published: 2026-06-25 14:32 – Updated: 2026-06-25 14:53
VLAI
Title
Nokogiri: Possible Use-After-Free when setting an attribute value via `Nokogiri::XML::Attr#value=` or `#content=`
Summary
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri’s CRuby native extension could leave a Ruby wrapper pointing to freed memory when replacing the value of an XML attribute. If Ruby code had already accessed an attribute child node, Nokogiri::XML::Attr#value= could free the underlying native child node while the wrapper remained reachable through the document node cache. A later use of the freed child node or a Ruby GC mark could dereference an invalid pointer, causing an invalid read and a possible segfault. This vulnerability is fixed in 1.19.4.
Severity
1.7 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 14:53 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
sparklemotion nokogiri Affected: < 1.19.4
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-57256 (GCVE-0-2026-57256)

Vulnerability from cvelistv5 – Published: 2026-07-08 07:35 – Updated: 2026-07-09 17:37
VLAI
Title
Foxit Editor/Reader List Box Format Use-After-Free Vulnerability
Summary
When the application opens a PDF and executes JavaScript, it performs abnormal operations on the list box field, and this operation is repeated after the form is reset. During this process, the application failed to adequately verify the validity of the form objects and their internal dictionary pointers, resulting in accessing internal members of invalid or improperly initialized fields. This led to an illegal pointer read, ultimately causing the application to crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:38 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.1.1 and earlier
Affected: Versions 14.0.4 and earlier
Affected: Versions 13.2.4 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.1.1 and earlier
Affected: Versions 14.0.3 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.1.1 and earlier
Create a notification for this product.
Credits
KPC of Cisco Talos
Show details on NVD website
To clipboard 

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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.

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