{"id":"DEBIAN-CVE-2026-41565","details":"CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.  The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.  Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.","modified":"2026-09-14T17:03:33.958202159Z","published":"2026-05-28T16:16:22.343Z","upstream":["CVE-2026-41565"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-41565"}],"affected":[{"package":{"name":"libcryptx-perl","ecosystem":"Debian:12","purl":"pkg:deb/debian/libcryptx-perl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.077-1","0.078-1","0.080-1","0.080-2","0.081-1","0.081-2","0.082-1","0.082.001-1","0.084-1","0.085-1","0.087-1","0.087-2","0.088-1","0.089-1","0.090-1","0.090-1~bpo13+1","0.091-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41565.json"}},{"package":{"name":"libcryptx-perl","ecosystem":"Debian:13","purl":"pkg:deb/debian/libcryptx-perl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.085-1","0.085-1+deb13u1","0.087-1","0.087-2","0.088-1","0.089-1","0.090-1","0.090-1~bpo13+1","0.091-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41565.json"}},{"package":{"name":"libcryptx-perl","ecosystem":"Debian:14","purl":"pkg:deb/debian/libcryptx-perl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.089-1"}]}],"versions":["0.085-1","0.087-1","0.087-2","0.088-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41565.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}