CVE-2019-14877: Newlib Project Newlib

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

In the __mdiff function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate big integers, however no check is performed to verify if the allocation succeeded or not. The access to _wds and _sign will trigger a null pointer dereference bug in case of a memory allocation failure.

Affected products

• Newlib Project Newlib: before 3.3.0 (fixed in 3.3.0)

Published 2020-03-19. Last modified 2026-06-17.