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CWE-416: Use After Free, page 37

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

What the weakness is: CWE-416 at MITRE

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Show the promptExplain CWE-416: Use After Free and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/416.html and https://cve.bz/cve/cwe/416?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

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  1. 7.8CVE-2026-49167EPSS 0.4%

    Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

  2. 7.8CVE-2026-49166EPSS 0.3%

    Use after free in Microsoft Printer Drivers allows an authorized attacker to elevate privileges locally.

  3. 7.0CVE-2026-49162EPSS 0.3%

    Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

  4. 7.0CVE-2026-48572EPSS 0.2%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Installer allows an authorized attacker to elevate privileges locally.

  5. 7.0CVE-2026-48571EPSS 0.3%

    Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally.

  6. 7.8CVE-2026-44800EPSS 0.2%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

  7. 8.1CVE-2026-42900EPSS 0.5%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Store allows an unauthorized attacker to elevate privileges over a network.

  8. 5.1CVE-2026-40467EPSS 0.2%

    Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.

  9. 7.8CVE-2026-10667EPSS 0.1%

    Zephyr's dynamic kernel-object tracking (kernel/userspace/userspace.c, formerly kernel/userspace.c) maintains a doubly-linked list (obj_list) of dynamically allocated kernel objects. Iteration over this list in k_object_wordlist_foreach() …

  10. 6.1CVE-2026-10663EPSS 0.2%

    In Zephyr's experimental USB host stack (CONFIG_USB_HOST_STACK), usbh_device_disconnect() (subsys/usb/host/usbh_device.c) freed the root usb_device slab object without clearing the cached pointer ctx->root. The bus removal handler dev_remo…

  11. 6.3CVE-2026-61861EPSS 0.6%

    ImageMagick before 7.1.2-26 contains a use-after-free vulnerability in the FormatMagickCaption method when memory allocation fails. Attackers can trigger memory allocation failures to cause a dangling pointer to reference freed memory, pot…

  12. 7.8CVE-2026-34196EPSS 0.2%

    Software installed and run as a non-privileged user may conduct improper GPU system calls to cause an integer overflow and map two GPU virtual addresses to the same physical address. One of these virutal mappings can be freed along with th…

  13. 6.3CVE-2026-56373EPSS 0.2%

    ImageMagick before 7.1.2-15 contains a use-after-free vulnerability in the PDB decoder that uses a stale pointer when memory allocation fails. Attackers can trigger this vulnerability by processing malicious PDB files to cause crashes or w…

  14. 1.9CVE-2026-15194EPSS 0.2%

    A security flaw has been discovered in Open5GS 2.7.7. This affects the function amf_context_final of the file src/amf/context.c of the component AMF. Performing a manipulation results in use after free. The attack is only possible with loc…

  15. 8.8CVE-2026-15133EPSS 0.4%

    Use after free in InterestGroups in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

  16. 8.8CVE-2026-15129EPSS 0.3%

    Use after free in Views in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)

  17. 8.8CVE-2026-15126EPSS 0.4%

    Use after free in Forms in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

  18. 8.8CVE-2026-15121EPSS 0.5%

    Use after free in WebRTC in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

  19. 8.3CVE-2026-15120EPSS 0.3%

    Use after free in Core in Google Chrome on Windows prior to 150.0.7871.115 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Hig…

  20. 8.8CVE-2026-15118EPSS 0.4%

    Use after free in Input in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

  21. 7.5CVE-2026-15117EPSS 0.3%

    Use after free in Payments in Google Chrome prior to 150.0.7871.115 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severit…

  22. 8.8CVE-2026-15116EPSS 0.4%

    Use after free in Actor in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

  23. 9.6CVE-2026-15113EPSS 0.3%

    Use after free in Autofill in Google Chrome on Android prior to 150.0.7871.115 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

  24. 8.8CVE-2026-15112EPSS 0.3%

    Use after free in Ozone in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)

  25. 7.5CVE-2026-15111EPSS 0.3%

    Use after free in Views in Google Chrome prior to 150.0.7871.115 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: …

  26. 8.8CVE-2026-15110EPSS 0.3%

    Use after free in Extensions in Google Chrome prior to 150.0.7871.115 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. (Chromium security sever…

  27. 8.8CVE-2026-15107EPSS 0.4%

    Use after free in IndexedDB in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Medium)

  28. 7.8CVE-2026-57256EPSS 0.2%

    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 v…

  29. 7.8CVE-2026-57252EPSS 0.2%

    When the application opens a PDF file, during the process of JavaScript deleting pages and removing attachment annotations, it will cause the attachment panel to continue accessing invalid pointers, eventually leading to the application cr…

  30. 7.8CVE-2026-57250EPSS 0.2%

    When the application opens a PDF and JavaScript resets the form fields, the script re-enters the interface. The underlying native object is damaged, but the application does not perform validation. The function call on the damaged object l…

  31. 7.8CVE-2026-57249EPSS 0.2%

    After the application opened the PDF file, the script first reset the annotation status, then triggered the reset form event by additional action. During the re-entry process, the application access invalid objects and crashed.

  32. 7.8CVE-2026-57247EPSS 0.2%

    The application re-enters the document structure via field processing and deletes the current page, and then continues using the field objects obtained before deletion, triggering an illegal read and crashing.

  33. 7.8CVE-2026-57245EPSS 0.2%

    When the application opens a PDF, traverses and builds the annotation elements related to hyperlinks, it fails to validate the abnormal annotation relationships and field combinations. This results in the internal objects entering an inval…

  34. 7.8CVE-2026-57244EPSS 0.2%

    After JavaScript resetting the form, the synchronization process lacks re-entry protection and object lifecycle verification, resulting in the failure of the control pointer during the traversal process. After the pointer fails, it still c…

  35. 7.8CVE-2026-57242EPSS 0.2%

    The application opens the PDF, and JavaScript modifies the form. However, the related objects on the page lack complete lifecycle management and null value validation; when the page state changes, the application continuously dereferences …

  36. 7.8CVE-2026-57240EPSS 0.2%

    When the application opens a PDF file and JavaScript deletes the PDF fields, the subsequent logic still uses the old field pointers, resulting in invalid pointer references and causing the application to crash.

  37. 7.8CVE-2026-57238EPSS 0.2%

    After the application opened the PDF, JavaScript deleted the form field object. Subsequently, it attempted to access the invalid object, which caused the application to crash.

  38. 7.8CVE-2026-57237EPSS 0.2%

    When the application opens a PDF and JavaScript modifies the properties of form fields, it causes the state of the underlying objects referenced by the program to become invalid. Eventually, it reads an illegal memory address, which leads …

  39. 9.0CVE-2026-56000EPSS 0.3%

    Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memor…

  40. 7.8CVE-2026-13129EPSS 0.2%

    When the application opens a PDF file, JavaScript uses the damaged field tree to trigger field traversal, resulting in the program holding an invalid form object when accessing the field property path. Eventually, the application crashes d…

  41. 7.8CVE-2026-13128EPSS 0.2%

    Embedding JavaScript within a PDF file will cause the page to be deleted. Subsequent scripts will continue to access the relevant properties of the document view, eventually leading to the crash of the application.

  42. 7.8CVE-2026-13127EPSS 0.2%

    The application opens the PDF file. JavaScript then rewrites the document to modify the page structure, resulting in the invalidation of the page objects. However, the thumbnails still use the invalid page objects, ultimately causing the a…

  43. 7.8CVE-2026-13126EPSS 0.2%

    The embedded JavaScript in the PDF deleted the pages, making the object invalid. The application attempted to perform a write operation on the invalid pop-up annotations, resulting in the program crashing.

  44. 9.4CVE-2026-60002EPSS 0.3%

    ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)

  45. 8.4CVE-2026-42958EPSS 0.2%

    The application contains a use-after-free vulnerability that can be exploited to cause memory corruption while parsing specially crafted files. This could allow an attacker to execute arbitrary code in the context of the current process.

  46. 7.3CVE-2025-59617EPSS 0.09%

    Memory Corruption when processing multiple IOCTL calls with the same buffer file descriptor input.

  47. 7.8CVE-2025-59616EPSS 0.09%

    Memory Corruption when processing multiple IOCTL calls with the same buffer file descriptor input due to accessing already freed memory.

  48. 7.8CVE-2025-59615EPSS 0.09%

    Memory Corruption when invoking device input/output control operations for mapping and unmapping persistent memory buffers due to improper synchronization.

  49. 1.9CVE-2026-14788EPSS 0.2%

    A security vulnerability has been detected in radareorg radare2 up to 6.1.6. Affected by this vulnerability is the function r_core_bin_load of the file libr/core/cfile.c. Such manipulation leads to use after free. The attack needs to be pe…

  50. 1.9CVE-2026-14760EPSS 0.2%

    A weakness has been identified in radareorg radare2 up to 6.1.6. Impacted is the function r_core_seek_arch_bits of the file libr/core/disasm.c of the component regprofile Handler. Executing a manipulation can lead to use after free. The at…