CVE-2026-5450 — scanf %mc off-by-one heap buffer overflow
Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width…
Published: 2026-04-20 · CVSS: 9.8 · CVSS 3.1
Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7