{"id":"DEBIAN-CVE-2025-9820","details":"A flaw was found in the GnuTLS library, specifically in the gnutls_pkcs11_token_init() function that handles PKCS#11 token initialization. When a token label longer than expected is processed, the function writes past the end of a fixed-size stack buffer. This programming error can cause the application using GnuTLS to crash or, in certain conditions, be exploited for code execution. As a result, systems or applications relying on GnuTLS may be vulnerable to a denial of service or local privilege escalation attacks.","modified":"2026-09-02T08:47:34.618380454Z","published":"2026-01-26T20:16:09.370Z","upstream":["CVE-2025-9820"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-9820"}],"affected":[{"package":{"name":"gnutls28","ecosystem":"Debian:12","purl":"pkg:deb/debian/gnutls28?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.9-2+deb12u6"}]}],"versions":["3.7.9-2","3.7.9-2+deb12u1","3.7.9-2+deb12u2","3.7.9-2+deb12u3","3.7.9-2+deb12u4","3.7.9-2+deb12u5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-9820.json"}},{"package":{"name":"gnutls28","ecosystem":"Debian:13","purl":"pkg:deb/debian/gnutls28?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.9-3+deb13u1"}]}],"versions":["3.8.9-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-9820.json"}},{"package":{"name":"gnutls28","ecosystem":"Debian:14","purl":"pkg:deb/debian/gnutls28?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.11-3"}]}],"versions":["3.8.10-1","3.8.10-2","3.8.10-3","3.8.11-1","3.8.11-2","3.8.9-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-9820.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}