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CWE-416: Use After Free, page 44

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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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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-2026-47914EPSS 0.3%

    Acrobat Reader versions 24.001.30365, 26.001.21651 and earlier are 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 intera…

  2. 7.8CVE-2026-47913EPSS 0.3%

    Acrobat Reader versions 24.001.30365, 26.001.21651 and earlier are 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 intera…

  3. 7.8CVE-2026-47912EPSS 0.3%

    Acrobat Reader versions 24.001.30365, 26.001.21651 and earlier are 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 intera…

  4. 7.8CVE-2026-34696EPSS 0.2%

    InDesign Desktop versions 21.3, 20.5.3 and earlier are 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 tha…

  5. 7.8CVE-2026-48583EPSS 0.3%

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

  6. 7.5CVE-2026-48563EPSS 0.5%

    Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  7. 7.5CVE-2026-47654EPSS 0.5%

    Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  8. 8.8CVE-2026-47653EPSS 0.6%

    Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  9. 7.0CVE-2026-47293EPSS 0.2%

    Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.

  10. 9.8CVE-2026-45657EPSS 15%

    Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

  11. 7.0CVE-2026-45653EPSS 0.3%

    Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

  12. 7.0CVE-2026-45640EPSS 0.2%

    Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.

  13. 7.8CVE-2026-45637EPSS 0.3%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  14. 8.1CVE-2026-45635EPSS 0.6%

    Access of resource using incompatible type ('type confusion') in Universal Plug and Play (upnp.dll) allows an unauthorized attacker to execute code over a network.

  15. 7.8CVE-2026-45605EPSS 0.3%

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

  16. 7.0CVE-2026-45603EPSS 0.2%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  17. 7.0CVE-2026-45601EPSS 0.2%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  18. 8.1CVE-2026-45599EPSS 0.5%

    Use after free in Universal Plug and Play (upnp.dll) allows an unauthorized attacker to execute code over a network.

  19. 7.0CVE-2026-45596EPSS 0.2%

    Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  20. 7.8CVE-2026-45593EPSS 0.3%

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

  21. 7.8CVE-2026-45592EPSS 0.3%

    Integer overflow or wraparound in Windows Internet (wininet.dll) allows an authorized attacker to elevate privileges locally.

  22. 7.8CVE-2026-45486EPSS 0.4%

    Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

  23. 8.2CVE-2026-45476EPSS 0.3%

    Use after free in Linux MANA Driver allows an authorized attacker to elevate privileges locally.

  24. 8.4CVE-2026-45474EPSS 0.4%

    Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

  25. 8.4CVE-2026-45472EPSS 0.4%

    Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

  26. 8.4CVE-2026-45461EPSS 0.4%

    Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

  27. 8.4CVE-2026-45458EPSS 0.4%

    Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

  28. 8.8CVE-2026-45447EPSS 4.0%

    Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote…

  29. 7.8CVE-2026-44823EPSS 0.4%

    Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  30. 7.8CVE-2026-44813EPSS 0.3%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  31. 7.8CVE-2026-44811EPSS 0.3%

    Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  32. 7.8CVE-2026-44809EPSS 0.3%

    Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

  33. 7.8CVE-2026-44808EPSS 0.3%

    Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  34. 7.8CVE-2026-44807EPSS 0.3%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  35. 5.5CVE-2026-44805EPSS 0.4%

    Use after free in Windows Network Controller (NC) Host Agent allows an authorized attacker to deny service locally.

  36. 7.8CVE-2026-44804EPSS 0.3%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  37. 7.8CVE-2026-44802EPSS 0.3%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  38. 7.5CVE-2026-44801EPSS 0.5%

    Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  39. 7.8CVE-2026-42991EPSS 0.2%

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

  40. 8.1CVE-2026-42987EPSS 0.6%

    Use after free in Windows Deployment Services allows an unauthorized attacker to execute code over a network.

  41. 7.8CVE-2026-42986EPSS 2.0%

    Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

  42. 8.8CVE-2026-42985EPSS 1.3%

    Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  43. 7.0CVE-2026-42984EPSS 0.3%

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

  44. 7.8CVE-2026-42983EPSS 0.3%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  45. 7.8CVE-2026-42979EPSS 0.2%

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

  46. 7.8CVE-2026-42978EPSS 0.2%

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

  47. 7.5CVE-2026-42913EPSS 0.5%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  48. 7.0CVE-2026-42911EPSS 0.2%

    Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  49. 7.5CVE-2026-42909EPSS 0.4%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

  50. 7.8CVE-2026-42905EPSS 2.0%

    Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.