CVE-2020-37239 — libbabl 0.1.62 Broken Double Free Detection Memory Safety
libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety checks by exploiting signature overwriting in freed chunks. At…
Published: 2026-05-16 · CVSS: 9.3 · CVSS 4.0
libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety checks by exploiting signature overwriting in freed chunks. Attackers can call babl_free() twice on the same pointer without triggering detection, as libc's malloc metadata overwrites babl's signature field upon freeing, enabling potential memory corruption and code execution.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7