CWE-416

Use After Free

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

CVE-2026-50257 (GCVE-0-2026-50257)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:31 – Updated: 2026-06-10 03:58
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50260 (GCVE-0-2026-50260)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-06-10 03:58
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50261 (GCVE-0-2026-50261)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-06-06 03:56
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50263 (GCVE-0-2026-50263)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-06-11 18:15
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-52757 (GCVE-0-2026-52757)

Vulnerability from cvelistv5 – Published: 2026-06-10 12:42 – Updated: 2026-06-10 16:31 X_Open Source
VLAI
Title
Ghidra < 12.1 - Heap-use-after-free in HighVariable::merge() during decompilation
Summary
Ghidra before 12.1 contains a heap-use-after-free vulnerability in the decompiler's HighVariable::merge() function during the variable merging pass. Attackers can trigger this vulnerability by crafting a binary that causes stale pointers in the HighIntersectTest::highedgemap cache to be dereferenced, reading and writing the flags field of freed heap memory when a user opens the binary in Ghidra's decompiler view.
Severity
4.6 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
nationalsecurityagency ghidra Affected: 0 , < 12.1 (custom)
Unaffected: 12.1 (custom)
Create a notification for this product.
Date Public
2026-05-15 00:00
Credits
Apple Security Engineering and Architecture (SEAR)
Show details on NVD website
To clipboard 

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CVE-2026-53462 (GCVE-0-2026-53462)

Vulnerability from cvelistv5 – Published: 2026-06-10 22:04 – Updated: 2026-06-11 15:45
VLAI
Title
ImageMagick: Use-After-Free when allocation in CheckPrimitiveExtent fails
Summary
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-50 and 7.1.2-25, when an allocation fails in CheckPrimitiveExtent this can result in a heap-use-after-free and result in a crash. This issue has been patched in versions 6.9.13-50 and 7.1.2-25.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
ImageMagick ImageMagick Affected: < 6.9.13-50
Affected: < 7.1.2-25
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-5398 (GCVE-0-2026-5398)

Vulnerability from cvelistv5 – Published: 2026-04-22 02:23 – Updated: 2026-04-23 03:56
VLAI
Title
Kernel use-after-free bug in the TIOCNOTTY handler
Summary
The implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session. If the invoking process then exits, the terminal structure may end up containing a pointer to freed memory. A malicious process can abuse the dangling pointer to grant itself root privileges.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
FreeBSD FreeBSD Affected: 15.0-RELEASE , < p6 (release)
Affected: 14.4-RELEASE , < p2 (release)
Affected: 14.3-RELEASE , < p11 (release)
Affected: 13.5-RELEASE , < p12 (release)
Create a notification for this product.
Date Public
2026-04-21 18:00
Credits
Nicholas Carlini using Claude, Anthropic
Show details on NVD website
To clipboard 

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CVE-2026-5460 (GCVE-0-2026-5460)

Vulnerability from cvelistv5 – Published: 2026-04-09 23:29 – Updated: 2026-04-10 13:51
VLAI
Title
Heap Use-After-Free in PQC Hybrid KeyShare Error Cleanup in wolfSSL TLS 1.3
Summary
A heap use-after-free exists in wolfSSL's TLS 1.3 post-quantum cryptography (PQC) hybrid KeyShare processing. In the error handling path of TLSX_KeyShare_ProcessPqcHybridClient() in src/tls.c, the inner function TLSX_KeyShare_ProcessPqcClient_ex() frees a KyberKey object upon encountering an error. The caller then invokes TLSX_KeyShare_FreeAll(), which attempts to call ForceZero() on the already-freed KyberKey, resulting in writes of zero bytes over freed heap memory.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 0 , < 5.9.1 (semver)
Create a notification for this product.
Credits
Calvin Young (eWalker Consulting Inc.) Enoch Chow (Isomorph Cyber)
Show details on NVD website
To clipboard 

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CVE-2026-5655 (GCVE-0-2026-5655)

Vulnerability from cvelistv5 – Published: 2026-04-30 05:38 – Updated: 2026-04-30 12:52
VLAI
Title
Use After Free in Wireshark
Summary
SDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 allows denial of service
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.5 (semver)
Create a notification for this product.
Credits
Huang Qiangxiong
Show details on NVD website
To clipboard 

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CVE-2026-5939 (GCVE-0-2026-5939)

Vulnerability from cvelistv5 – Published: 2026-04-27 11:00 – Updated: 2026-04-28 12:50
VLAI
Title
UAF in Foxit PDF Editor/Reader via XFA calculate event
Summary
A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.1 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 and earlier
Create a notification for this product.
Credits
Haein Lee from KAIST Hacking Lab
Show details on NVD website
To clipboard 

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Mitigation

Phase: Architecture and Design

Strategy: Language Selection

Description:

  • Choose a language that provides automatic memory management.
Mitigation

Phase: Implementation

Strategy: Attack Surface Reduction

Description:

  • 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.

Back to CWE stats page