UAF meaning in Computing ?

Answer: What is Use After Free mean?

Dangling pointers and wild pointers in computer programming are pointers that do not point to a valid object of the appropriate type. These are special cases of memory safety violations. More generally, dangling references and wild references are references that do not resolve to a valid destination, and include such phenomena as link rot on the internet.

Dangling pointers arise during object destruction, when an object that has an incoming reference is deleted or deallocated, without modifying the value of the pointer, so that the pointer still points to the memory location of the deallocated memory. The system may reallocate the previously freed memory, and if the program then dereferences the (now) dangling pointer, unpredictable behavior may result, as the memory may now contain completely different data. If the program writes to memory referenced by a dangling pointer, a silent corruption of unrelated data may result, leading to subtle bugs that can be extremely difficult to find. If the memory has been reallocated to another process, then attempting to dereference the dangling pointer can cause segmentation faults (UNIX, Linux) or general protection faults (Windows). If the program has sufficient privileges to allow it to overwrite the bookkeeping data used by the kernel's memory allocator, the corruption can cause system instabilities. In object-oriented languages with garbage collection, dangling references are prevented by only destroying objects that are unreachable, meaning they do not have any incoming pointers; this is ensured either by tracing or reference counting. However, a finalizer may create new references to an object, requiring object resurrection to prevent a dangling reference.

Wild pointers arise when a pointer is used prior to initialization to some known state, which is possible in some programming languages. They show the same erratic behavior as dangling pointers, though they are less likely to stay undetected because many compilers will raise a warning at compile time if declared variables are accessed before being initialized.

reference

Full Form	Category
University of Agriculture, Faisalabad, Pakistan	Academic & Science
University of Alaska at Fairbanks	Academic & Science
University Admissions Finland	Academic & Science
Un-available Funds	Accounts and Finance
Universal Air Filter	Business
Urgent Action Fund	Business
Utah Arts Festival	Community
Use After Free	Computing
Unrestricted Access Framework	Computing
User Authorization File	Computing
Under Age Fondling	General
Unite all Fascists	General
Unidad de Analisis Financiero	General
Urbanized Area Formula	General
Union Automobile Francaise	General
University of Aftermarket Foundation	General
United Alien Faculty	General
University of Agriculture Faisalabad	General
Unite Against Father	General
United Against Freedom	General
U Are F	General
Unite Against Facism	General
Unamerican Activities Force	General
United Arab Front	General
Ukrainian Armed Forces	Governmental
Unite Against Fascism	Governmental
Unidades de Administración Forestal	International
Unidades de Conservación y Desarrollo Forestal	International
Ugly As F***	Internet
User Account File	Military and Defence
Union Air Force	Military and Defence
University of Alaska, Fairbanks	Regional
United Action Front	Regional
Microsoft Unrestricted Access Framework	Softwares