{"id":"AZL-100962","summary":"CVE-2026-19499 affecting package glibc 2.38-21","details":"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.\n\nExploitation 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.\n\nAt the time of publication, no network-facing application impact is known.","modified":"2026-09-17T05:36:01Z","published":"2026-09-14T18:17:45Z","upstream":["CVE-2026-19499"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19499"}],"affected":[{"package":{"name":"glibc","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/glibc"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.38-21"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-100962.json"}}],"schema_version":"1.9.0"}