CVE-2026-19499 Buffer overflow in strfmon and strfmon_l right-justification padding

Calling strfmon and strfmonl in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding. Exploitation requires an application code path that calls strfmon or strfmonl with right-justified width padding...

CVE-2026-19499

CVE-2026-19499 is a buffer overflow in the GNU C Library (glibc) versions 2.38 to 2.44 , affecting the strfmon and strfmon_l functions. The root cause is an incorrect length used for an internal memmove operation when a conversion uses right-justified width padding , causing a write past the end ...