VULNERABILITY INTELLIGENCE
CVE-2026-19499
CVSS score7.7 HIGH
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-09-14
Last modified2026-09-18
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H
Description
Calling strfmon and strfmon_l 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 strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller. At the time of publication, no network-facing application impact is known.
Weakness classification
- CWE-122: Heap-based Buffer Overflow