There is a use-after-free at asm/preproc.c (function pp_getline) in Netwide Assembler (NASM) 2.14rc16 that will cause a denial of service during a line-number increment attempt.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Netwide_assembler | Nasm | 2.14.0-rc16 (including) | 2.14.0-rc16 (including) |
| Nasm | Ubuntu | bionic | * |
| Nasm | Ubuntu | cosmic | * |
| Nasm | Ubuntu | disco | * |
| Nasm | Ubuntu | eoan | * |
| Nasm | Ubuntu | focal | * |
| Nasm | Ubuntu | trusty | * |
| Nasm | Ubuntu | xenial | * |