In the __i2b function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. The access of _ x[0] will trigger a null pointer dereference bug in case of a memory allocation failure.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade newlibUpgrade picolibc | Jul 30, 2024 | Mar 19, 2020 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Mar 19, 2020 |
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